Added a missing / separator after the paths in operationRef, now it's

'#/paths/~12.0~1repositories~1/{username}/get' == '#/paths/<'/2.0/repositories/{username}'.encode()>/get

Author: tfesenko

versions/3.0.md

@@ -2069,7 +2069,7 @@ value), references MAY also be made through a relative `operationRef`:
 links:
   UserRepositories:
     # returns array of '#/components/schemas/repository'
-    operationRef: '#/paths~12.0~1repositories~1/{username}/get'
+    operationRef: '#/paths/~12.0~1repositories~1/{username}/get'
     parameters:
       username: $response.body#/username
 ```