fmt: fix prettier formatting in CODE_STYLEGUIDE_GO.md

prompts/CODE_STYLEGUIDE_GO.md

@@ -240,8 +240,8 @@ last_modified: 2026-02-22
 
 1.  When defining custom string-based types (e.g. `type ImageID string`),
     implement `fmt.Stringer`. Use `.String()` at SDK and library boundaries
-    instead of `string(v)`. This makes type conversions explicit, grep-able,
-    and consistent across the codebase. Example:
+    instead of `string(v)`. This makes type conversions explicit, grep-able, and
+    consistent across the codebase. Example:
 
     ```go
     type ContainerID string