[BOLT] Fix typo in comment

[maksfb]

Thanks!

[Eymay]

Thanks @maksfb. Can you land this patch for me?
Please use “Eymen Ünay [e-mail]" to commit the change.

bolt/lib/Rewrite/DWARFRewriter.cpp

if (RangesBase)
       DIEBldr.addValue(&Die, RangeBaseAttribute, dwarf::DW_FORM_sec_offset,
                        DIEInteger(*RangesBase));
   }
 
   uint64_t RangeAttrVal = RangesSectionOffset - BaseOffset;
   if (Unit.getVersion() >= 5)
     RangeAttrVal = RangesSectionOffset;
   // HighPC was conveted into DW_AT_ranges.
-  // For DWARF5 we only access ranges throught index.
+  // For DWARF5 we only access ranges through index.
 
   DIEBldr.replaceValue(&Die, HighPCAttrInfo.getAttribute(), dwarf::DW_AT_ranges,
                        RangesForm, DIEInteger(RangeAttrVal));
 }