Fix CI cache configuration

Remove specific cache-dependency-path to fix npm cache resolution in GitHub Actions.
Let setup-node action auto-detect package-lock.json location.

Author: antonym

.github/workflows/build.yml

@@ -19,7 +19,6 @@ jobs:
       with:
         node-version: '18'
         cache: 'npm'
-        cache-dependency-path: 'package-lock.json'
 
     - name: Install dependencies
       run: npm ci

.github/workflows/webapp-dev.yml

@@ -13,7 +13,6 @@ jobs:
       with:
         node-version: '18'
         cache: 'npm'
-        cache-dependency-path: 'package-lock.json'
 
     - name: Install dependencies
       run: npm ci