Update gki-kernel.yml

.github/workflows/gki-kernel.yml

@@ -71,7 +71,7 @@ jobs:
         #if: inputs.use_cache == true
         uses: hendrikmuhs/ccache-action@v1
         with:
-          key: $CONFIG
+          key: ${{ inputs.android_version }}-${{ inputs.kernel_version }}-${{ inputs.sub_level }}
           max-size: 2G
 
       - name: Cache toolchain