Update index.html

Co-authored-by: Dave Longley <[email protected]>

index.html

@@ -1383,7 +1383,7 @@ <h3>Identifiers</h3>
 scenarios. There are also other types of access and correlation mechanisms documented
 in Section <a href="#privacy-considerations"></a> that create privacy concerns.
 Where privacy is a strong consideration, it is permissible to omit the 
-`id` [=property=]. Some use cases do not require, or explicitly require omitting,
+`id` [=property=]. Some use cases do not need, or explicitly need to omit,
 the `id` [=property=]. Similarly, special attention is to be given to the choice between
 publicly resolvable URLs and other forms of identifiers. Publicly resolvable URLs can
 facilitate ease of verification and interoperability, yet they might also inadvertently