chore(deps): update gcr.io/cloud-spanner-emulator/emulator docker tag to v1.5.47

Author: renovate-bot

.github/workflows/spanner-emulator-pr-push.yml

@@ -17,7 +17,7 @@ jobs:
       DOTNET_NOLOGO: true
     services:
       emulator:
-        image: gcr.io/cloud-spanner-emulator/emulator:1.5.46
+        image: gcr.io/cloud-spanner-emulator/emulator:1.5.47
         ports:
           - 9010:9010
           - 9020:9020