Fix version number

Author: kaelig

RELEASENOTES.md

@@ -730,7 +730,7 @@ The following features are being marked as deprecated in this release and will b
 Lots of bug fixes and TLC.
 
 [Unreleased]: https://github.com/salesforce-ux/design-system-internal/compare/v2.1.2...winter-17
-[2.1.1]: https://github.com/salesforce-ux/design-system/compare/v2.0.3...v2.1.2
+[2.1.2]: https://github.com/salesforce-ux/design-system/compare/v2.0.3...v2.1.2
 [2.0.3]: https://github.com/salesforce-ux/design-system/compare/v2.0.2...v2.0.3
 [2.0.2]: https://github.com/salesforce-ux/design-system/compare/v2.0.1...v2.0.2
 [2.0.1]: https://github.com/salesforce-ux/design-system/compare/v1.0.5...v2.0.1