Fix ref to push from a forked repo

Author: DaleLore

.github/workflows/frontend-lint-test-build.yaml

@@ -51,7 +51,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
         with:
-          ref: ${{ github.head_ref }}
+          ref: ${{ github.event.pull_request.head.ref }}
 
       - name: Setup Node
         uses: actions/setup-node@v4
@@ -195,7 +195,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
         with:
-          ref: ${{ github.head_ref }}
+          ref: ${{ github.event.pull_request.head.ref }}
 
       - name: Setup Node
         uses: actions/setup-node@v4
@@ -228,7 +228,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
         with:
-          ref: ${{ github.head_ref }}
+          ref: ${{ github.event.pull_request.head.ref }}
 
       - name: Setup Node
         uses: actions/setup-node@v4
@@ -261,7 +261,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
         with:
-          ref: ${{ github.head_ref }}
+          ref: ${{ github.event.pull_request.head.ref }}
 
       - name: Setup Node
         uses: actions/setup-node@v4