Fix pnpm action cache paths for frontend lockfile

Author: gildesmarais

.github/workflows/ci.yml

@@ -59,6 +59,8 @@ jobs:
         with:
           version: 10
           cache: true
+          cache_dependency_path: frontend/pnpm-lock.yaml
+          package_json_file: frontend/package.json
 
       - name: Setup Node.js for OpenAPI lint tooling
         uses: actions/setup-node@v6
@@ -88,6 +90,8 @@ jobs:
         with:
           version: 10
           cache: true
+          cache_dependency_path: frontend/pnpm-lock.yaml
+          package_json_file: frontend/package.json
 
       - name: Setup Node.js
         uses: actions/setup-node@v6
@@ -191,6 +195,8 @@ jobs:
         with:
           version: 10
           cache: true
+          cache_dependency_path: frontend/pnpm-lock.yaml
+          package_json_file: frontend/package.json
 
       - name: Setup Node.js for Docker build
         uses: actions/setup-node@v6