Update draft-ietf-mls-architecture.md

Co-authored-by: rohan-wire <[email protected]>

draft-ietf-mls-architecture.md

@@ -479,7 +479,7 @@ The simplest pattern is for a client to just send a Commit which contains one or
 for instance Alice could send a Commit with the Proposal Add(Bob) embedded to add
 Bob to the group. However, there are situations in which one client
 might send a proposal and another might send the commit. For instance,
-Bob might wish to remove himself the group and send a Remove Proposal to do so (see
+Bob might wish to remove himself from the group and send a Remove Proposal to do so (see
 {{Section 12.1.3 of ?RFC9420}}). Because Bob
 cannot send the Commit, an existing member must do so.
 Commits can apply to multiple valid Proposals, in which case all the listed