Update build-kernel-a12.yml

.github/workflows/build-kernel-a12.yml

@@ -325,7 +325,7 @@ jobs:
       - name: Upload Build Artifacts
         uses: actions/upload-artifact@v4
         with:
-          name: ${{ env.CONFIG }}
+          name: kernel-${{ env.CONFIG }}
           path: |
             *.zip
             *.img