Fix syntactic typo in comment.

Co-authored-by: Chip Davis <cdavis@codeweavers.com>
diff --git a/MoltenVK/MoltenVK/GPUObjects/MVKDevice.mm b/MoltenVK/MoltenVK/GPUObjects/MVKDevice.mm
index 669ecac..b46eea6 100644
--- a/MoltenVK/MoltenVK/GPUObjects/MVKDevice.mm
+++ b/MoltenVK/MoltenVK/GPUObjects/MVKDevice.mm
@@ -611,7 +611,7 @@
 					return VK_ERROR_FORMAT_NOT_SUPPORTED;
 				}
 #if !MVK_APPLE_SILICON
-				// - On macOS IMR GPU's, Linear textures may not be used as framebuffer attachments.
+				// - On macOS IMR GPUs, Linear textures may not be used as framebuffer attachments.
 				if (hasAttachmentUsage) { return VK_ERROR_FORMAT_NOT_SUPPORTED; }
 #endif
 				// Linear textures may only have one mip level, layer & sample.