Update on 202205 release notes (#1585)

* Update on Known Issue

Updated the 202205 release notes with a known issue column

doc/SONiC_202205_Release_Notes.md

@@ -10,6 +10,7 @@ This document captures the new features added and enhancements done on existing
  * [Dependency Version](#dependency-version)
  * [Security Updates](#security-updates)
  * [Feature List](#feature-list)
+ * [Known Issues](#Known-Issues)
  * [SAI APIs](#sai-apis)
  * [Contributors](#contributors)
 
@@ -328,6 +329,11 @@ Refer below mentioned PR's for more details.
 <br>  **Pull Requests** : [10047](https://github.com/sonic-net/sonic-buildimage/pull/10047)
 
 
+# Known Issues 
+On the 202205 release image, a difference of 0.2 - 0.3 sec is observed (for slower CPU's) when running show cli's. This is reflected in most of the show cli's since many of them import device_info which is still using swsssdk in 202205 release. This is a known observation of this 202205 image.
+
+This known issue, has been fixed in 202211 release through the [PR#10099](https://github.com/sonic-net/sonic-buildimage/pull/10099). As mentioned in the other [PR#16595](https://github.com/sonic-net/sonic-buildimage/issues/16595), the fix is not backported to 202205 branch and hence the issue will continue to exit in 202205 image.
+
 # SAI APIs
 
 Please find the list of API's classified along the newly added SAI features. For further details on SAI API please refer [SAI_1.10.2 Release Notes](https://github.com/opencomputeproject/SAI/blob/master/doc/SAI_1.10.2_ReleaseNotes.md)