Refactor GitLab CI script: improve conditional formatting and streamline commit message

.gitlab-ci.yml

@@ -73,11 +73,12 @@ deploy_to_wiki:
     - echo "Listing files in wiki directory"
     - ls -la
     - git add .
-    - if git diff-index --quiet HEAD; then
-          echo "No changes to commit";
+    - |
+      if git diff-index --quiet HEAD; then
+        echo "No changes to commit"
       else
         git commit -m "Update Wiki with Thesis - $(date)"
-        git push "https://oauth2:${GITLAB_TOKEN}@${CI_SERVER_HOST}/${CI_PROJECT_PATH}.wiki.git" HEAD:main -o ci.skip;
+        git push "https://oauth2:${GITLAB_TOKEN}@${CI_SERVER_HOST}/${CI_PROJECT_PATH}.wiki.git" HEAD:main -o ci.skip
       fi
   only:
     - main