Update .gitlab-ci.yml

.gitlab-ci.yml

 build:
     stage: build
-    tags: gitlab-runner
     script:
         - echo "Build"
         - mkdir build
@@ -8,9 +7,11 @@ build:
     artifacts:
         paths:
             - build/
+    tags: gitlab-runner
+
 test:
     stage: test
-    tags: gitlab-runner
     script:
         - echo "Testing"
-        - test -f "build/info.txt"
\ No newline at end of file
+        - test -f "build/info.txt"
+    tags: gitlab-runner