Update README.md

Co-authored-by: Atif Ali <atif@coder.com>

Author: DevelopmentCats

registry/coder-labs/modules/codex/README.md

@@ -27,7 +27,7 @@ module "codex" {
 
 ## Examples
 
-### **Run standalone**
+### Run standalone
 
 ```tf
 module "codex" {