Update npm to latest version in workflow

Added step to update npm to the latest version before installing dependencies.

Author: roymiloh

.github/workflows/manual-publish.yml

@@ -39,6 +39,9 @@ jobs:
           cache: "npm"
           registry-url: "https://registry.npmjs.org"
 
+      - name: Update npm
+        run: npm install -g npm@latest
+
       - name: Install dependencies
         run: npm ci