fix use of word

Author: NotMoni

contributions.md

@@ -65,7 +65,7 @@ Informal discussion regarding bugs, new features, and implementation of existing
 
 **All** bug fixes should be sent to the latest stable branch or to the [current LTS branch](/docs/{{version}}/releases#support-policy). Bug fixes should **never** be sent to the `master` branch unless they fix features that exist only in the upcoming release.
 
-**Minor** features that are **fully backwards compatible** with the current release may be sent to the latest stable branch.
+**Minor** features that are **fully backward compatible** with the current release may be sent to the latest stable branch.
 
 **Major** new features should always be sent to the `master` branch, which contains the upcoming release.