fix(ci): reduce checkout fetch-depth from 0 to 1 to speed up CI

fetch-depth: 0 downloads entire git history through GH_PROXY,
taking ~7 minutes. fetch-depth: 1 is sufficient for Dockerfile builds.

Signed-off-by: JavaPythonAIForBAT <wuhejun@h-partners.com>

Author: JavaPythonAIForBAT

.github/workflows/buildkit-dockerfile-test-group1.yaml

@@ -31,7 +31,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v7
         with:
-          fetch-depth: 0
+          fetch-depth: 1
           persist-credentials: false
 
       - name: Determine SOC_VERSION