Merge branch 'wc-fix-grpc_trace' into 'master'

Docs: Fix Gitaly GRPC_TRACE example command

See merge request gitlab-org/gitlab!26934

doc/administration/gitaly/index.md

@@ -861,7 +861,7 @@ default level is `WARN`.
 You can run a gRPC trace with:
 
 ```shell
-GRPC_TRACE=all GRPC_VERBOSITY=DEBUG sudo gitlab-rake gitlab:gitaly:check
+sudo GRPC_TRACE=all GRPC_VERBOSITY=DEBUG gitlab-rake gitlab:gitaly:check
 ```
 
 ### Observing `gitaly-ruby` traffic