Update actions/setup-go reference URL for current version

Author: per1234

.github/workflows/check-go-task.yml

@@ -2,7 +2,7 @@
 name: Check Go
 
 env:
-  # See: https://github.com/actions/setup-go/tree/v2#readme
+  # See: https://github.com/actions/setup-go/tree/v3#readme
   GO_VERSION: "1.16"
 
 # See: https://docs.github.com/en/actions/reference/events-that-trigger-workflows