Clarify a sentence

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/docs/architecture/psa-migration/psa-limitations.md b/docs/architecture/psa-migration/psa-limitations.md
index 915922d..45c7806 100644
--- a/docs/architecture/psa-migration/psa-limitations.md
+++ b/docs/architecture/psa-migration/psa-limitations.md
@@ -53,8 +53,8 @@
 
 In TLS 1.3 the situation will be simpler: named groups are the only
 option, so the current PSA Crypto API is a good match for that. (Not
-coincidentally, the groups used by RFC 7919 and TLS 1.3 are part those defined
-in the specification.)
+coincidentally, all the groups used by RFC 7919 and TLS 1.3 are included
+in the PSA specification.)
 
 There are several options here: