Set VkPhysicalDeviceDriverPropertiesKHR::driverID to VK_DRIVER_ID_MOLTENVK.

Update to latest version of Vulkan-Headers.
diff --git a/Docs/MoltenVK_Runtime_UserGuide.md b/Docs/MoltenVK_Runtime_UserGuide.md
index 3332286..e187e7f 100644
--- a/Docs/MoltenVK_Runtime_UserGuide.md
+++ b/Docs/MoltenVK_Runtime_UserGuide.md
@@ -263,6 +263,7 @@
 - `VK_KHR_descriptor_update_template`
 - `VK_KHR_device_group`
 - `VK_KHR_device_group_creation`
+- `VK_KHR_driver_properties`
 - `VK_KHR_get_memory_requirements2`
 - `VK_KHR_get_physical_device_properties2`
 - `VK_KHR_get_surface_capabilities2`
diff --git a/Docs/Whats_New.md b/Docs/Whats_New.md
index cb25e10..a3a8376 100644
--- a/Docs/Whats_New.md
+++ b/Docs/Whats_New.md
@@ -19,8 +19,9 @@
 Released TBD
 
 - Add support for extensions:
-	- VK_KHR_sampler_ycbcr_conversion
-	- VK_EXT_robustness2
+	- `VK_KHR_driver_properties`
+	- `VK_KHR_sampler_ycbcr_conversion`
+	- `VK_EXT_robustness2`
 - Add native support for `VK_FORMAT_D16_UNORM` on **_iOS 13.0+_** and **_tvOS 13.0+_**.
 - Add support for **_tvOS_** platform.
 - Add support for **_iOS Simulator_** and **_tvOS Simulator_** build destinations.
diff --git a/ExternalRevisions/Vulkan-Headers_repo_revision b/ExternalRevisions/Vulkan-Headers_repo_revision
index 20b16f5..d347369 100644
--- a/ExternalRevisions/Vulkan-Headers_repo_revision
+++ b/ExternalRevisions/Vulkan-Headers_repo_revision
@@ -1 +1 @@
-09531f27933bf04bffde9074acb302e026e8f181
+83825d55c7d522931124696ecb07ed48f2693e5c
diff --git a/MoltenVK/MoltenVK/GPUObjects/MVKDevice.mm b/MoltenVK/MoltenVK/GPUObjects/MVKDevice.mm
index 5518cc1..239dd29 100644
--- a/MoltenVK/MoltenVK/GPUObjects/MVKDevice.mm
+++ b/MoltenVK/MoltenVK/GPUObjects/MVKDevice.mm
@@ -259,7 +259,7 @@
 				auto* physicalDeviceDriverProps = (VkPhysicalDeviceDriverPropertiesKHR*)next;
 				strcpy(physicalDeviceDriverProps->driverName, "MoltenVK");
 				strcpy(physicalDeviceDriverProps->driverInfo, mvkGetMoltenVKVersionString(MVK_VERSION).c_str());
-				physicalDeviceDriverProps->driverID = (VkDriverId) 0; /* FIXME: VK_DRIVER_ID_MOLTENVK_KHR */
+				physicalDeviceDriverProps->driverID = VK_DRIVER_ID_MOLTENVK;
 				physicalDeviceDriverProps->conformanceVersion.major = 0;
 				physicalDeviceDriverProps->conformanceVersion.minor = 0;
 				physicalDeviceDriverProps->conformanceVersion.subminor = 0;