docs: Little fix in Goma docs (#21762)

* docs: Little fix in Goma docs

* docs: Remove space

docs/development/goma.md

@@ -25,7 +25,7 @@ the Goma service.  You only need to do this once per-machine.
 
 ```bash
 cd electron/external_binaries/goma
-goma_auth.py login
+./goma_auth.py login
 ```
 
 Once authenticated you need to make sure the goma daemon is running on your
@@ -33,7 +33,7 @@ machine.
 
 ```bash
 cd electron/external_binaries/goma
-goma_ctl.py ensure_start
+./goma_ctl.py ensure_start
 ```
 
 ## Building with Goma