Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -4,8 +4,8 @@ trigger-root:
     script:
         - apt update && apt install -y curl
         - TARGET_BRANCH="$CI_COMMIT_BRANCH"
-        - if [[ "$TARGET_BRANCH" = "main" ]]; then
-            TARGET_BRANCH="master";
+        - if [ "$TARGET_BRANCH" = "main" ]; then
+            TARGET_BRANCH="master"
           fi
         - 'curl --fail --request POST --form "variables[ADITO_COMMIT_MESSAGE]=$CI_COMMIT_MESSAGE" --form "token=$PUSH_TRIGGER_TOKEN" --form "ref=$TARGET_BRANCH" "https://gitlab.adito.de/api/v4/projects/676/trigger/pipeline"'
     only: