Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -9,7 +9,7 @@ cache:
 before_script:
   - npm install gitbook-cli -g # install gitbook
   - gitbook fetch 3.2.3 # fetch final stable version
-  - gitbook install intopic-toc # add any requested plugins in book.json
+  - gitbook install # add any requested plugins in book.json
 
 test:
   stage: test