Update VR HAL docs.

Bug: 28526281
Change-Id: If9673af47962f6fadd10f8a622e9587245f7ffb6
diff --git a/include/hardware/thermal.h b/include/hardware/thermal.h
index e7189e2..b5b6e1d 100644
--- a/include/hardware/thermal.h
+++ b/include/hardware/thermal.h
@@ -82,8 +82,8 @@
   float shutdown_threshold;
 
   /**
-   * Threshold temperature at which VR mode clockrate minumums cannot be
-   * maintained for this device temperature type.
+   * Threshold temperature above which the VR mode clockrate minimums cannot
+   * be maintained for this device.
    * If not available, set by HAL to UNKNOWN_TEMPERATURE.
    */
   float vr_throttling_threshold;