gh-pages: Update man pages for v1.20.0 release

Signed-off-by: Jianxin Xiong <[email protected]>

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 v1.19.0](https://github.com/ofiwg/libfabric/releases/tag/v1.19.0) (or [see all prior releases](https://github.com/ofiwg/libfabric/releases/)).
+* The libfabric library, unit tests, and documentation: [libfabric v1.20.0](https://github.com/ofiwg/libfabric/releases/tag/v1.20.0) (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.
 
@@ -40,7 +40,8 @@ A comprehensive developer's guide is included with the man pages.
 
 A set of man pages have been carefully written to specify the libfabric API.
 
-* [Man pages for v1.19.0](v1.19.0/man/)
+* [Man pages for v1.20.0](v1.20.0/man/)
+  * Older: [Man pages for v1.19.0](v1.19.0/man/)
   * Older: [Man pages for v1.18.2](v1.18.2/man/)
   * Older: [Man pages for v1.18.1](v1.18.1/man/)
   * Older: [Man pages for v1.18.0](v1.18.0/man/)