Bump shivammathur/setup-php in the github-actions group (#927)

Bumps the github-actions group with 1 update: [shivammathur/setup-php](https://github.com/shivammathur/setup-php).


Updates `shivammathur/setup-php` from 2.35.4 to 2.35.5
- [Release notes](https://github.com/shivammathur/setup-php/releases)
- [Commits](shivammathur/setup-php@ec406be...bf6b4fb)

---
updated-dependencies:
- dependency-name: shivammathur/setup-php
  dependency-version: 2.35.5
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/exercise-lint-phpcs-psr-12.yml

@@ -20,7 +20,7 @@ jobs:
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
 
-      - uses: shivammathur/setup-php@ec406be512d7077f68eed36e63f4d91bc006edc4
+      - uses: shivammathur/setup-php@bf6b4fbd49ca58e4608c9c89fba0b8d90bd2a39f
         with:
           php-version: ${{ matrix.php-version }}
           extensions: gmp

.github/workflows/exercise-tests-phpunit-11.yml

@@ -26,7 +26,7 @@ jobs:
 
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
 
-      - uses: shivammathur/setup-php@ec406be512d7077f68eed36e63f4d91bc006edc4
+      - uses: shivammathur/setup-php@bf6b4fbd49ca58e4608c9c89fba0b8d90bd2a39f
         with:
           php-version: ${{ matrix.php-version }}
           extensions: gmp