change license header file

Author: sebsto

.license_header_template

@@ -1,13 +1,13 @@
 @@===----------------------------------------------------------------------===@@
 @@
-@@ This source file is part of the ${PROJECT_NAME} open source project
+@@ This source file is part of the Swift OpenAPI Lambda open source project
 @@
 @@ Copyright (c) YEARS Amazon.com, Inc. or its affiliates
-@@                    and the ${PROJECT_NAME} project authors
+@@                    and the Swift OpenAPI Lambda project authors
 @@ Licensed under Apache License v2.0
 @@
 @@ See LICENSE.txt for license information
-@@ See CONTRIBUTORS.txt for the list of ${PROJECT_NAME} project authors
+@@ See CONTRIBUTORS.txt for the list of Swift OpenAPI Lambda project authors
 @@
 @@ SPDX-License-Identifier: Apache-2.0
 @@

.licenseignore

@@ -1,4 +1,3 @@
-
 .gitignore
 .swiftformatignore
 .spi.yml