Fixed typos: hanlder should be handler.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15642 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Library/PiDxeS3BootScriptLib/BootScriptSave.c

@@ -163,7 +163,7 @@ SaveBootScriptDataToLockBox (
   run time phase.
   
   @param  Event   Pointer to this event
-  @param  Context Event hanlder private data 
+  @param  Context Event handler private data 
  **/
 VOID
 EFIAPI