Use ramsey/composer-install for examples dependencies

Replace manual composer install with ramsey/composer-install action
in integration tests workflow for consistency across all workflows.

Author: OskarStark

.github/workflows/integration-tests.yaml

@@ -66,8 +66,13 @@ jobs:
               uses: ramsey/composer-install@v3
 
             - name: Install examples dependencies
+              uses: ramsey/composer-install@v3
+              with:
+                  working-directory: examples
+
+            - name: Link examples
               working-directory: examples
-              run: composer install && ../link
+              run: ../link
 
             - name: Run commands examples
               run: php examples/commands/stores.php