GH Actions: Bump symfonycorp/security-checker-action from 2 to 3

Bumps [symfonycorp/security-checker-action](https://github.com/symfonycorp/security-checker-action) from 2 to 3.
- [Release notes](https://github.com/symfonycorp/security-checker-action/releases)
- [Commits](symfonycorp/security-checker-action@v2...v3)

---
updated-dependencies:
- dependency-name: symfonycorp/security-checker-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/security.yml

@@ -31,4 +31,4 @@ jobs:
  # This action checks the `composer.lock` file against known security vulnerabilities in the dependencies.
  # https://github.com/marketplace/actions/the-php-security-checker
  - name: Run Security Check
- uses: symfonycorp/security-checker-action@v2
+ uses: symfonycorp/security-checker-action@v3