ci: updating conventional_commits_linter stage

Author: DeveloperC286

.gitlab-ci.yml

@@ -26,7 +26,7 @@ conventional-commits-linting:
     - cargo install conventional_commits_linter
   script:
     # Lint all the commits in the branch.
-    - /usr/local/cargo/bin/conventional_commits_linter --from-reference "origin/$CI_MERGE_REQUEST_TARGET_BRANCH_NAME" --allow-angular-type-only
+    - /usr/local/cargo/bin/conventional_commits_linter --from-reference "origin/${CI_MERGE_REQUEST_TARGET_BRANCH_NAME}" --allow-angular-type-only
   rules:
     - if: $CI_MERGE_REQUEST_ID