Fix containerapp history.rst (#8790)

Co-authored-by: Nan Jiang <naji@microsoft.com>

Author: najian

src/containerapp/HISTORY.rst

@@ -4,14 +4,14 @@ Release History
 ===============
 upcoming
 ++++++
+* 'az containerapp sessionpool update': Support `--mi-system-assigned`, `--mi-user-assigned` and `--registry-identity`
 
 1.1.0b5
 ++++++
 * 'az containerapp auth update': Support authenticating blob storage token store using managed identity with `--blob-container-uri` and `--blob-container-identity`.
 * 'az containerapp env create': Set identity only when `--mi-system-assigned` or `--mi-user-assigned` is specified.
 * 'az containerapp env create': Set identity only when `--system-assigned` or `--user-assigned` is specified.
 * 'az containerapp up': Support deploying Azure AI Foundry model to Container App with `--model-registry`, `--model-name`, `--model-version`.
-* 'az containerapp sessionpool update': Support `--mi-system-assigned`, `--mi-user-assigned` and `--registry-identity`
 
 1.1.0b4
 ++++++