Execute `composer validate` only on changes to relevant files

.gitlab-ci.yml

@@ -1,11 +1,17 @@
 lint-composer-validate:
-  image: php:8.3
+  image:
+    name: php:8.3
+  interruptible: true
   parallel:
     matrix:
       - WORKING_DIR:
           - modules/core
           - modules/storage
           - website
+  rules:
+    - changes:
+        paths:
+          - "$WORKING_DIR/composer.*"
   script:
     - curl -sS https://getcomposer.org/installer | php
     - >
@@ -15,7 +21,9 @@ lint-composer-validate:
       --no-check-version
 
 lint-editorconfig:
-  image: mstruebing/editorconfig-checker:2.7.2
+  image:
+    name: mstruebing/editorconfig-checker:2.7.2
+  interruptible: true
   script:
     - ec -version
     - ec -verbose