Added the encountered error to the release-notes as well

release-notes/v0.9.0.md

@@ -24,6 +24,17 @@ If you are running `within the $GOPATH`, you would need to install godog like th
 
 If you are running `outside of the $GOPATH`, you should still specify a version.
 
+I you encounter this error, please try adding `GO111MODULE=on`:
+```
+/go# go get github.com/cucumber/godog/cmd/godog
+package github.com/cucumber/gherkin-go/v9: cannot find package "github.com/cucumber/gherkin-go/v9" in any of:
+	/usr/local/go/src/github.com/cucumber/gherkin-go/v9 (from $GOROOT)
+	/go/src/github.com/cucumber/gherkin-go/v9 (from $GOPATH)
+package github.com/cucumber/messages-go/v9: cannot find package "github.com/cucumber/messages-go/v9" in any of:
+	/usr/local/go/src/github.com/cucumber/messages-go/v9 (from $GOROOT)
+	/go/src/github.com/cucumber/messages-go/v9 (from $GOPATH)
+```
+
 
 ### Gherkin Core
 The following types have been switched for [messages-go](https://github.com/cucumber/messages-go).