fix dead link

xuwei-k · web-flow · commit 95aeb275f262 · 2018-06-05T12:33:43.000+09:00
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -1,3 +1,3 @@
 ## Contributing
 
-This project has the same [guidelines for contributors](https://github.com/scala/scala/blob/master/CONTRIBUTING.md) as scala/scala.
+This project has the same [guidelines for contributors](https://github.com/scala/scala/blob/2.13.x/CONTRIBUTING.md) as scala/scala.

Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,3 @@`
`1`	`1`	`## Contributing`
`2`	`2`
`3`		`-This project has the same [guidelines for contributors](https://github.com/scala/scala/blob/master/CONTRIBUTING.md) as scala/scala.`
	`3`	`+This project has the same [guidelines for contributors](https://github.com/scala/scala/blob/2.13.x/CONTRIBUTING.md) as scala/scala.`