Add PSAvoidAssignmentToAutomaticVariable to the default set of PSSA rules (#1101)

Author: bergmeister

src/PowerShellEditorServices/Services/Analysis/AnalysisService.cs

@@ -33,6 +33,7 @@ public class AnalysisService : IDisposable
         /// no settings file is specified.
         /// </summary>
         private static readonly string[] s_includedRules = {
+            "PSAvoidAssignmentToAutomaticVariable",
             "PSUseToExportFieldsInManifest",
             "PSMisleadingBacktick",
             "PSAvoidUsingCmdletAliases",