Update deployment workflow for npm installation

Replaced npm ci with npm install and removed lock file check.

Author: Diana-Cl

.github/workflows/deploy.yml

@@ -27,20 +27,12 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: 22
-          cache: npm
 
       - name: Setup Pages
         uses: actions/configure-pages@v4
 
-      - name: Ensure lock file exists
-        run: |
-          if [ ! -f package-lock.json ]; then
-            echo "Error: package-lock.json is missing. Run 'npm install' locally and commit the generated lock file."
-            exit 1
-          fi
-
       - name: Install dependencies
-        run: npm ci
+        run: npm install
 
       - name: Build with VitePress
         run: npm run build