CI action: Base NPM caching on package.json instead of package-lock.json (vufind-org#4566)

Author: demiankatz

.github/workflows/ci.yaml

@@ -49,7 +49,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: ~/.npm
-          key: npm-${{ hashFiles('package-lock.json') }}
+          key: npm-${{ hashFiles('**/package.json') }}
           restore-keys: npm-
 
       - name: Install node dependencies