gpu: add warning message to compute shaders option

runelite-client/src/main/java/net/runelite/client/plugins/gpu/GpuPluginConfig.java

@@ -101,6 +101,7 @@ public interface GpuPluginConfig extends Config
 		keyName = "useComputeShaders",
 		name = "Compute Shaders",
 		description = "Offloads face sorting to GPU, enabling extended draw distance. Requires plugin restart.",
+		warning = "This feature requires OpenGL 4.3 to use. Please check that your GPU supports this.\nRestart the plugin for changes to take effect.",
 		position = 6
 	)
 	default boolean useComputeShaders()