Bump shivammathur/setup-php from 2.30.2 to 2.31.1

Bumps [shivammathur/setup-php](https://github.com/shivammathur/setup-php) from 2.30.2 to 2.31.1.
- [Release notes](https://github.com/shivammathur/setup-php/releases)
- [Commits](8872c784b0...c541c155ee)

---
updated-dependencies:
- dependency-name: shivammathur/setup-php
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/test_php.yml

@@ -219,7 +219,7 @@ jobs:
 
       - name: Pin PHP version
         if: ${{ !matrix.continuous-only || inputs.continuous-run }}
-        uses: shivammathur/setup-php@8872c784b04a1420e81191df5d64fbd59d3d3033 # 2.30.2
+        uses: shivammathur/setup-php@c541c155eee45413f5b09a52248675b1a2575231 # 2.31.1
         with:
           php-version: ${{ matrix.version }}