(chore): Bump shivammathur/setup-php in the actions group

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


Updates `shivammathur/setup-php` from 2.9.0 to 2.31.1
- [Release notes](https://github.com/shivammathur/setup-php/releases)
- [Commits](shivammathur/setup-php@2.9.0...2.31.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/badges.yml

@@ -19,7 +19,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Setup PHP
-        uses: shivammathur/setup-php@2.9.0
+        uses: shivammathur/setup-php@2.31.1
         with:
           php-version: '8.1'
           extensions:  simplexml, dom, xml, xdebug, intl