fix: migrate deprecated CI_BUILD_REF_NAME variable

templates/gitlab-ci-python.yml

@@ -504,7 +504,7 @@ variables:
 
     # 3: Git commit, tag and push
     log_info "--- git push commit and tag..."
-    git push "$git_auth_url" "$CI_BUILD_REF_NAME"
+    git push "$git_auth_url" "$CI_COMMIT_REF_NAME"
     git push "$git_auth_url" --tags
 
     # 4: build new version distribution
@@ -844,7 +844,7 @@ py-release:
   script:
     - git config --global user.email "$GITLAB_USER_EMAIL"
     - git config --global user.name "$GITLAB_USER_LOGIN"
-    - git checkout -B $CI_BUILD_REF_NAME
+    - git checkout -B $CI_COMMIT_REF_NAME
     - configure_scm_auth
     - _release
   artifacts: