Update comment for ExtractHLVFromBlipMessage to clarify example when multiple mv and pv are present

Author: bbrks

db/hybrid_logical_vector.go

@@ -492,8 +492,8 @@ func appendRevocationMacroExpansions(currentSpec []sgbucket.MacroExpansionSpec,
 // ExtractHLVFromBlipMessage extracts the full HLV a string in the format seen over Blip
 // blip string may be the following formats
 //  1. cv only:    		cv
-//  2. cv and pv:  		cv;pv
-//  3. cv, pv, and mv: 	cv;mv;pv
+//  2. cv and pv:  		cv;pv1,pv2
+//  3. cv, pv, and mv: 	cv;mv1,mv2;pv1,pv2
 //
 // Function will return list of revIDs if legacy rev ID was found in the HLV history section (PV)
 // TODO: CBG-3662 - Optimise once we've settled on and tested the format with CBL