[Docs] Add changelog entry for 3.11.1 about libjwt.

Signed-off-by: Giacomo Marciani <mgiacomo@amazon.com>

Author: gmarciani

CHANGELOG.md

@@ -8,6 +8,7 @@ CHANGELOG
 - Pyxis is now disabled by default, so it must be manually enabled as documented in the product documentation.
 - Upgrade Python runtime to version 3.12 in ParallelCluster Lambda Layer.
 - Remove version pinning for setuptools to version prior to 70.0.0.
+- Upgrade libjwt to version 1.17.0.
 
 **BUG FIXES**
 - Fix an issue in the way we configure the Pyxis Slurm plugin in ParallelCluster that can lead to job submission failures.