Update CI workflow cache path to use package-lock.json

Co-authored-by: mgierschdev <62764972+mgierschdev@users.noreply.github.com>

Author: Copilot

.github/workflows/e2e-tests.yml

@@ -38,7 +38,7 @@ jobs:
         cache: 'npm'
         cache-dependency-path: |
           frontend/package-lock.json
-          e2e-tests/package.json
+          e2e-tests/package-lock.json
     
     # Grant execute permissions
     - name: Grant execute permission for gradlew