fixed the regex based rule in gitlab.ci file

.gitlab-ci.yml

-
 stages:
   - build
   - deploy
 
-
 docs-build:
   stage: build
   image: node:20
@@ -24,5 +22,4 @@ pages:
     paths:
       - public
   rules:
-    - if: '$CI_COMMIT_TAG =~ /^\d+\.\d+(\.\d+)?(-pl\d+){0,1}$/'
-
+    - if: $CI_COMMIT_BRANCH == "main"