fix license file header

Author: sebsto

Plugins/AWSLambdaPackager/PluginUtils.swift

@@ -1,4 +1,4 @@
-// ===----------------------------------------------------------------------===//
+//===----------------------------------------------------------------------===//
 //
 // This source file is part of the SwiftAWSLambdaRuntime open source project
 //
@@ -10,7 +10,7 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 //
-// ===----------------------------------------------------------------------===//
+//===----------------------------------------------------------------------===//
 
 import Dispatch
 import PackagePlugin