github workflows: upgrade actions/upload-artifact to version 3

This is a no-op change from v2 to v3, but github complains that nodejs
is outdated if you don't. It's not obvious why this required a major
version bump...

However, half of our uses are on v1, which has a decent fix: failure to
upload artifacts constitutes a step failure.

.github/workflows/cygwin.yml

@@ -93,7 +93,7 @@ jobs:
           SKIP_STATIC_BOOST: 1
         shell: C:\cygwin\bin\bash.exe --noprofile --norc -o igncr -eo pipefail '{0}'
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           name: ${{ matrix.NAME }}
           path: meson-test-run.*

.github/workflows/macos.yml

@@ -113,13 +113,13 @@ jobs:
     - run: ln -sfn /usr/local/Cellar/qt@4/4.8.7_6.reinstall /usr/local/Cellar/qt@4/4.8.7_6
     - run: meson setup "test cases/frameworks/4 qt" build -Drequired=qt4
     - run: meson compile -C build
-    - uses: actions/upload-artifact@v1
+    - uses: actions/upload-artifact@v3
       if: failure()
       with:
         name: Qt4_Mac_build
         path: build/meson-logs/meson-log.txt
     - run: meson test -C build -v
-    - uses: actions/upload-artifact@v1
+    - uses: actions/upload-artifact@v3
       if: failure()
       with:
         name: Qt4_Mac_test

.github/workflows/msys2.yml

@@ -124,7 +124,7 @@ jobs:
 
           MSYSTEM= python3 ./tools/run_with_cov.py run_tests.py --backend=ninja
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           name: ${{ matrix.NAME }}
           path: meson-test-run.*