调整workflow cache key的取值

Change-Id: Ib0cdd0c3ba3cb1202c0e54c7c16f41d759b31431

Author: archurtan

.github/workflows/opensource.yml

@@ -45,7 +45,7 @@ jobs:
           path: |
             ~/.gradle/caches
             ~/.gradle/wrapper
-          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('../sdk/secring.gpg.asc') }}
+          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/secring.gpg.asc') }}
           restore-keys: |
             ${{ runner.os }}-build-${{ env.cache-name }}-
             ${{ runner.os }}-build-