Fix broken contributing URL link

Zidane · Zidane · commit 1b8382912d04 · 2021-06-18T16:30:46.000-05:00
Signed-off-by: Chris Sanders &lt;zidane@spongepowered.org&gt;
diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
@@ -2,4 +2,4 @@
 
 We will always have a need for developers to help us improve Sponge. There is no such thing as a perfect project and things can always be improved. If you are a developer and are interested in helping then please do not hesitate. Just make sure you follow our guidelines.
 
-Please check our [Contribution Guidelines in the Sponge Documentation](https://docs.spongepowered.org/en/contributing/guidelines.html) for more information.
+Please check our [Contribution Guidelines in the Sponge Documentation](https://docs.spongepowered.org/stable/en/contributing/guidelines.html) for more information.

Original file line number	Diff line number	Diff line change
`@@ -2,4 +2,4 @@`
`2`	`2`
`3`	`3`	`We will always have a need for developers to help us improve Sponge. There is no such thing as a perfect project and things can always be improved. If you are a developer and are interested in helping then please do not hesitate. Just make sure you follow our guidelines.`
`4`	`4`
`5`		`-Please check our [Contribution Guidelines in the Sponge Documentation](https://docs.spongepowered.org/en/contributing/guidelines.html) for more information.`
	`5`	`+Please check our [Contribution Guidelines in the Sponge Documentation](https://docs.spongepowered.org/stable/en/contributing/guidelines.html) for more information.`