ci: correct Trivy action repository reference format

- Update Trivy action reference to use the correct repository format

Signed-off-by: appleboy <appleboy.tw@gmail.com>

.gitea/workflows/test-pr.yml

@@ -31,7 +31,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Run Trivy vulnerability scanner in repo mode
-        uses: github.com/aquasecurity/trivy-action@0.28.0
+        uses: aquasecurity/trivy-action@0.28.0
         with:
           scan-type: 'fs'
           ignore-unfixed: true