chore(deps): update gcr.io/cloud-spanner-emulator/emulator docker tag to v1.5.34 (#8293)

Author: renovate-bot

.github/workflows/system-tests-spanner-emulator.yaml

@@ -18,7 +18,7 @@ jobs:
 
     services:
       emulator:
-        image: gcr.io/cloud-spanner-emulator/emulator:1.5.33
+        image: gcr.io/cloud-spanner-emulator/emulator:1.5.34
         ports:
           - 9010:9010
           - 9020:9020