reuse: Cleanup copyright for *.md files

.reuse/dep5

@@ -13,7 +13,3 @@ License: Apache-2.0
 Files: .github/ISSUE_TEMPLATE/bug_report.md .github/pull_request_template.md
 Copyright: 2022-2023 The Khronos Group Inc.
 License: Apache-2.0
-
-Files: BUILD.md CODE_OF_CONDUCT.md CONTRIBUTING.md INTEGRATION.md README.md
-Copyright: 2018-2023 The Khronos Group Inc.
-License: Apache-2.0

BUILD.md

@@ -1,3 +1,9 @@
+<!--
+Copyright 2018-2023 The Khronos Group Inc.
+
+SPDX-License-Identifier: Apache-2.0
+-->
+
 # Build Instructions
 
 Instructions for building this repository.

CONTRIBUTING.md

@@ -1,3 +1,9 @@
+<!--
+Copyright 2018-2023 The Khronos Group Inc.
+
+SPDX-License-Identifier: Apache-2.0
+-->
+
 # CONTRIBUTING
 
 Please note when contributing what files this repository actually is responsible for.

INTEGRATION.md

@@ -1,3 +1,9 @@
+<!--
+Copyright 2018-2023 The Khronos Group Inc.
+
+SPDX-License-Identifier: Apache-2.0
+-->
+
 # Integrating Updated Vulkan Headers into Vulkan Repositories
 
 - This guide assumes the [Vulkan-Headers](https://github.com/KhronosGroup/Vulkan-Headers), [Vulkan-Loader](https://github.com/KhronosGroup/Vulkan-Loader), [Vulkan-Tools](https://github.com/KhronosGroup/Vulkan-Tools), [Vulkan-ValidationLayers](https://github.com/KhronosGroup/Vulkan-ValidationLayers), [LunarG/VulkanSamples](https://github.com/LunarG/VulkanSamples), and [LunarG/VulkanTools](https://github.com/LunarG/VulkanTools) repositories have been cloned to a known directory on the system. If necessary, see the `BUILD.md` file in each repository for information on how to clone and build the projects.

README.md

@@ -1,3 +1,9 @@
+<!--
+Copyright 2018-2023 The Khronos Group Inc.
+
+SPDX-License-Identifier: Apache-2.0
+-->
+
 # Vulkan-Headers
 
 Vulkan header files and API registry