Updated support matrix to include XR_EXT_hand_interaction and XR_EXT_user_presence extensions implemented in Varjo runtime

Author: dennyronngren

runtimes/varjo.json

@@ -18,10 +18,12 @@
         "XR_KHR_win32_convert_performance_counter_time",
         "XR_EXT_debug_utils",
         "XR_EXT_eye_gaze_interaction",
+        "XR_EXT_hand_interaction",
         "XR_EXT_hand_tracking",
         "XR_EXT_hp_mixed_reality_controller",
         "XR_EXT_samsung_odyssey_controller",        
         "XR_EXT_palm_pose",
+        "XR_EXT_user_presence",
         "XR_EXT_win32_appcontainer_compatible",
         "XR_VARJO_composition_layer_depth_test",
         "XR_VARJO_environment_depth_estimation",