ci: default branch is master

.gitlab-ci.yml

@@ -17,7 +17,7 @@ tests:
       when: manual
     - if: $CI_COMMIT_TAG
       when: never
-    - if: '$CI_MERGE_REQUEST_ID ||$CI_COMMIT_BRANCH == "main" || $CI_COMMIT_BRANCH =~ /^release/'
+    - if: '$CI_MERGE_REQUEST_ID ||$CI_COMMIT_BRANCH == "master" || $CI_COMMIT_BRANCH =~ /^release/'
     - when: manual
   stage: tests
   script: