Update changelog of 3.1.4

Signed-off-by: chenwany <[email protected]>

Author: chenwany

CHANGELOG.md

@@ -10,6 +10,7 @@ CHANGELOG
 **CHANGES**
 - Upgrade Slurm to version 21.08.8-2.
 - Do not require `PlacementGroup/Enabled` to be set to `true` when passing an existing `PlacementGroup/Id`.
+- Add `lambda:TagsResource` to `ParallelClusterUserRole` used by ParallelCluster API stack for cluster creation and image creation.
 
 **BUG FIXES**
 - Fix the ability to export cluster's logs when using `export-cluster-logs` command with the `--filters` option.