Update @microsoft/vscode-azext-azureappservice to 4.2.3 (#4950)

Author: alexweininger

package-lock.json

@@ -1589,7 +1589,7 @@
         "@azure/core-client": "^1.7.3",
         "@azure/core-rest-pipeline": "^1.11.0",
         "@azure/storage-blob": "^12.5.0",
-        "@microsoft/vscode-azext-azureappservice": "^4.2.1",
+        "@microsoft/vscode-azext-azureappservice": "^4.2.3",
         "@microsoft/vscode-azext-azureappsettings": "^1.0.0",
         "@microsoft/vscode-azext-azureutils": "^4.0.1",
         "@microsoft/vscode-azext-utils": "^4.0.5",