Fixes a subject-verb agreement in Unknown Fields sections.

PiperOrigin-RevId: 845739349

Author: protobuf-github-bot

content/programming-guides/editions.md

@@ -1115,8 +1115,8 @@ fields that the parser does not recognize. For example, when an old binary
 parses data sent by a new binary with new fields, those new fields become
 unknown fields in the old binary.
 
-Editions messages preserve unknown fields and includes them during parsing and
-in the serialized output, which matches proto2 and proto3 behavior.
+Editions messages preserve unknown fields and include them during parsing and in
+the serialized output, which matches proto2 and proto3 behavior.
 
 ### Retaining Unknown Fields {#retaining}
 

content/programming-guides/proto3.md

@@ -1154,7 +1154,7 @@ fields that the parser does not recognize. For example, when an old binary
 parses data sent by a new binary with new fields, those new fields become
 unknown fields in the old binary.
 
-Proto3 messages preserve unknown fields and includes them during parsing and in
+Proto3 messages preserve unknown fields and include them during parsing and in
 the serialized output, which matches proto2 behavior.
 
 ### Retaining Unknown Fields {#retaining}