Fit indentation for troubleshooting sub-section

doc/user/clusters/agent/index.md

@@ -537,7 +537,7 @@ issue is in progress, directly edit the deployment with the
 `kubectl edit deployment gitlab-kas` command, and change `--listen-websocket=true` to `--listen-websocket=false`. After running that command, you should be able to use
 `grpc://gitlab-kas.<YOUR-NAMESPACE>:5005`.
 
-#### Agent logs - Decompressor is not installed for grpc-encoding
+### Agent logs - Decompressor is not installed for grpc-encoding
 
 ```plaintext
 {"level":"warn","time":"2020-11-05T05:25:46.916Z","msg":"GetConfiguration.Recv failed","error":"rpc error: code = Unimplemented desc = grpc: Decompressor is not installed for grpc-encoding \"gzip\""}