ci: Update to checkout@v4 to squelch node warnings

Keep using v3 for Bionic because of https://github.com/mesonbuild/meson/pull/13424

.github/workflows/codeql-analysis.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v2

.github/workflows/cygwin.yml

@@ -49,7 +49,7 @@ jobs:
 
       - run: git config --global core.autocrlf input
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: cygwin/cygwin-install-action@master
         with:

.github/workflows/file_format.yml

@@ -13,7 +13,7 @@ jobs:
   format:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v4
       with:
         python-version: '3.x'

.github/workflows/images.yml

@@ -45,6 +45,7 @@ jobs:
           - { name: Ubuntu Bionic,    id: bionic   }
           - { name: Ubuntu Rolling,   id: ubuntu-rolling  }
     steps:
+        # Need v3 because of bionic
       - uses: actions/checkout@v3
 
       # Login to dockerhub

.github/workflows/lint.yml

@@ -22,7 +22,7 @@ jobs:
   pylint:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v4
       with:
         python-version: '3.x'
@@ -32,7 +32,7 @@ jobs:
   flake8:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           python-version: '3.x'
@@ -42,7 +42,7 @@ jobs:
   mypy:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v4
       with:
         python-version: '3.x'

.github/workflows/macos.yml

@@ -31,7 +31,7 @@ jobs:
   unittests-appleclang:
     runs-on: macos-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v4
       with:
         python-version: '3.x'
@@ -81,7 +81,7 @@ jobs:
       HOMEBREW_NO_AUTO_UPDATE: 1
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     # Avoid picking up an older version of LLVM that does not work.
     - run: brew update
     # github actions overwrites brew's python. Force it to reassert itself, by running in a separate step.
@@ -132,7 +132,7 @@ jobs:
     env:
       HOMEBREW_NO_AUTO_UPDATE: 1
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v4
       with:
         python-version: '3.x'

.github/workflows/msys2.yml

@@ -61,7 +61,7 @@ jobs:
         shell: msys2 {0}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: msys2/setup-msys2@v2
         with:

.github/workflows/nonnative.yml

@@ -37,7 +37,7 @@ jobs:
         apt-get -y purge clang gcc gdc
         apt-get -y autoremove
         python3 -m pip install coverage
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Run tests
       run: bash -c 'source /ci/env_vars.sh; cd $GITHUB_WORKSPACE; ./tools/run_with_cov.py ./run_tests.py $CI_ARGS --cross ubuntu-armhf.json --cross-only'
 

.github/workflows/os_comp.yml

@@ -54,6 +54,7 @@ jobs:
       MESON_CI_JOBNAME: linux-${{ matrix.cfg.id }}-gcc
 
     steps:
+      # Need v3 because of bionic
     - uses: actions/checkout@v3
     - name: Run tests
       # All environment variables are stored inside the docker image in /ci/env_vars.sh
@@ -80,7 +81,7 @@ jobs:
       MESON_CI_JOBNAME_UPDATE: linux-arch-gcc-pypy
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Run tests
       run: |
         source /ci/env_vars.sh
@@ -134,7 +135,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Run tests
         shell: bash

.github/workflows/stable_builddir.yml

@@ -14,7 +14,7 @@ jobs:
     env:
       TESTDIR: "manual tests/13 builddir upgrade"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: install ninja
         run: sudo apt-get -y install build-essential ninja-build
       - name: Fetch tags and unshallow

.github/workflows/unusedargs_missingreturn.yml

@@ -44,7 +44,7 @@ jobs:
   linux:
     runs-on: ubuntu-20.04
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v4
       with:
         python-version: '3.x'
@@ -71,7 +71,7 @@ jobs:
   windows:
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v4
       with:
         python-version: '3.x'

.github/workflows/website.yml

@@ -32,7 +32,7 @@ jobs:
       HAS_SSH_KEY: ${{ secrets.WEBSITE_PRIV_KEY != '' }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: actions/cache/restore@v3
         id: restore-cache