chore: update botframework-webchat to v4.15.1 (#2376)

* chore: update botframework-webchat to v4.15.1

* Run CI

* Kick CI

Co-authored-by: Eugene Olonov <v-evolo@microsoft.com>

packages/app/client/package.json

@@ -109,9 +109,9 @@
     "@uifabric/styling": "^5.20.0",
     "base64url": "3.0.0",
     "botframework-config": "4.4.0",
-    "botframework-schema": "4.14.0",
-    "botframework-webchat": "4.14.0",
-    "botframework-webchat-core": "4.14.0",
+    "botframework-schema": "4.15.0",
+    "botframework-webchat": "4.15.1",
+    "botframework-webchat-core": "4.15.1",
     "core-js": "^3.6.5",
     "eslint-plugin-react": "^7.12.3",
     "eslint-plugin-security": "^1.4.0",