Use correct action references for Forgejo Actions

Forgejo has actions/checkout, actions/upload-artifact, and aws-actions/configure-aws-credentials in its data repository. Only peaceiris/actions-hugo needs the full GitHub URL.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.forgejo/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
     
     steps:
       - name: Checkout code
-        uses: https://github.com/actions/checkout@v4
+        uses: actions/checkout@v4
         with:
           submodules: recursive
           fetch-depth: 0
@@ -26,7 +26,7 @@ jobs:
         run: hugo --minify
       
       - name: Upload build artifacts
-        uses: https://github.com/actions/upload-artifact@v4
+        uses: actions/upload-artifact@v4
         with:
           name: hugo-build
           path: public/

.forgejo/workflows/deploy.yml

@@ -11,7 +11,7 @@ jobs:
     
     steps:
       - name: Checkout code
-        uses: https://github.com/actions/checkout@v4
+        uses: actions/checkout@v4
         with:
           submodules: recursive
           fetch-depth: 0
@@ -26,7 +26,7 @@ jobs:
         run: hugo --minify
       
       - name: Configure AWS credentials
-        uses: https://github.com/aws-actions/configure-aws-credentials@v4
+        uses: aws-actions/configure-aws-credentials@v4
         with:
           aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
           aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}