nongnu: Add newer version of vulkan-headers.

* nongnu/packages/game-client.scm (vulkan-headers/newer): New variable.

nongnu/packages/game-client.scm

@@ -50,11 +50,28 @@
   #:use-module (gnu packages python-xyz)
   #:use-module (gnu packages toolkits)
   #:use-module (gnu packages video)
+  #:use-module (gnu packages vulkan)
   #:use-module (gnu packages xorg)
   #:use-module (nonguix build-system chromium-binary)
   #:use-module (nonguix multiarch-container)
   #:use-module (nonguix utils))
 
+(define vulkan-headers/newer
+  (package
+    (inherit vulkan-headers)
+    (name "vulkan-headers")
+    (version "vulkan-sdk-1.3.280.0")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/KhronosGroup/Vulkan-Headers")
+             (commit version)))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32
+         "13mmv5621z73hlfnsrccbcb4z0d7kwj92a081701vbpss45a4whj"))))))
+
 (define heroic-client
   (package
     (name "heroic-client")