Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -49,7 +49,7 @@ unit-test-backend:
   artifacts:
     paths:
       - backend/target/site/jacoco/
-  coverage: '/Total.*?([0-9]{1,3})%/'
+  coverage: '/([0-9]{1,3}\.[0-9]{2})% covered/'
   needs: ["build-backend"]
   cache:
     <<: *cache-maven