gh-pages: Update link to the latest release

Signed-off-by: Jianxin Xiong <jianxin.xiong@intel.com>

index.md

@@ -16,7 +16,7 @@ data-canonical-src="https://s3.amazonaws.com/github/ribbons/forkme_right_orange_
 Latest releases
 ===============
 
-* The libfabric library, unit tests, and documentation: [libfabric v1.21.0](https://github.com/ofiwg/libfabric/releases/tag/v1.21.0) (or [see all prior releases](https://github.com/ofiwg/libfabric/releases/)).
+* The libfabric library, unit tests, and documentation: [libfabric v1.22.0](https://github.com/ofiwg/libfabric/releases/tag/v1.22.0) (or [see all prior releases](https://github.com/ofiwg/libfabric/releases/)).
 
 Libfabric targets 3 major releases per year, following this schedule: March, July, and November.  The timing of a specific release is adjusted based on the readiness of the underlying providers.