devel: fix/update script path in api_changes.md

Signed-off-by: tianyang ni [email protected]

/sig architecture
/kind cleanup documentation

Author: t1anz0ng

contributors/devel/sig-architecture/api_changes.md

@@ -939,7 +939,7 @@ an example to illustrate your change.
 Make sure you update the swagger and OpenAPI spec by running:
 
 ```sh
-hack/update-swagger-spec.sh
+hack/update-generated-swagger-docs.sh
 hack/update-openapi-spec.sh
 ```