update npm command from ci to install for building the documentation site

Author: starkris51

action.yml

@@ -154,7 +154,7 @@ runs:
       run: |
         chmod -R u+rwX vuepress/docs || true
         cd vuepress
-        npm ci && ${{ inputs.debug-build == true && 'DEBUG=*' || '' }} npm run build ${{ inputs.debug-build == true && '-- --debug' || '' }}
+        npm i && ${{ inputs.debug-build == true && 'DEBUG=*' || '' }} npm run build ${{ inputs.debug-build == true && '-- --debug' || '' }}
 
     - name: Zips built site files
       shell: bash