deps(amazonq): Update to Mynah UI 4.30.0 aws#6960

## Problem
* Amazon Q extension sometimes crashed with a grey screen
* Chat history icon was not easy for users to identify

## Solution
* Update to [Mynah UI 4.30.0](https://github.com/aws/mynah-ui/releases)

Author: avi-alpert

package-lock.json

@@ -0,0 +1,4 @@
+{
+	"type": "Bug Fix",
+	"description": "Amazon Q Chat: Update chat history icon"
+}

packages/amazonq/.changes/next-release/Bug Fix-2daaf655-9a45-4104-94f9-06b9d8c703e2.json

@@ -0,0 +1,4 @@
+{
+	"type": "Bug Fix",
+	"description": "Amazon Q Chat: chat occasionally freezes and displays gray screen"
+}

packages/amazonq/.changes/next-release/Bug Fix-338b0a7b-81fd-460a-82f4-8e65e4a0614c.json

@@ -524,7 +524,7 @@
         "@aws-sdk/s3-request-presigner": "<3.731.0",
         "@aws-sdk/smithy-client": "<3.731.0",
         "@aws-sdk/util-arn-parser": "<3.731.0",
-        "@aws/mynah-ui": "^4.27.0",
+        "@aws/mynah-ui": "^4.30.0",
         "@gerhobbelt/gitignore-parser": "^0.2.0-9",
         "@iarna/toml": "^2.2.5",
         "@smithy/fetch-http-handler": "^5.0.1",

packages/core/package.json

@@ -970,7 +970,7 @@ export const createMynahUI = (
             tabBarButtons: [
                 {
                     id: 'history_sheet',
-                    icon: MynahIcons.COMMENT,
+                    icon: MynahIcons.HISTORY,
                     description: 'View chat history',
                 },
                 /* Temporarily hide export chat button from tab bar