Bump ramsey/composer-install from 2 to 3 (#17)

Bumps [ramsey/composer-install](https://github.com/ramsey/composer-install) from 2 to 3.
- [Release notes](https://github.com/ramsey/composer-install/releases)
- [Commits](ramsey/composer-install@v2...v3)

---
updated-dependencies:
- dependency-name: ramsey/composer-install
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/run-tests.yml

@@ -34,7 +34,7 @@ jobs:
 
             - name: Install dependencies
               if: steps.cache-php.outputs.cache-hit != 'true'
-              uses: ramsey/composer-install@v2
+              uses: ramsey/composer-install@v3
               with:
                   dependency-versions: ${{ matrix.dependency-version }}
                   composer-options: "--prefer-dist"
@@ -66,7 +66,7 @@ jobs:
 
             - name: Install dependencies
               if: steps.cache-php.outputs.cache-hit != 'true'
-              uses: ramsey/composer-install@v2
+              uses: ramsey/composer-install@v3
               with:
                   dependency-versions: highest
                   composer-options: "--prefer-dist"