Update tests with correct CommittedLeaderEpoch versioning

Author: LeonHartley

go.mod

@@ -1,6 +1,6 @@
 module github.com/segmentio/kafka-go
 
-go 1.23
+go 1.23.0
 
 require (
 	github.com/klauspost/compress v1.15.9

protocol/offsetcommit/offsetcommit_test.go

@@ -93,11 +93,35 @@ func TestOffsetCommitRequest(t *testing.T) {
 		})
 	}
 
-	// Version 5 added:
-	// RequestTopic.RequestPartition.CommitedLeaderEpoc
 	// Version 5 removed:
 	// RetentionTimeMs
-	// Fields are the same through version 6.
+	for _, version := range []int16{5, 6} {
+		prototest.TestRequest(t, version, &offsetcommit.Request{
+			GroupID:      "group-3",
+			GenerationID: 1,
+			MemberID:     "member-3",
+			Topics: []offsetcommit.RequestTopic{
+				{
+					Name: "topic-3",
+					Partitions: []offsetcommit.RequestPartition{
+						{
+							PartitionIndex:    0,
+							CommittedOffset:   1,
+							CommittedMetadata: "meta-3-0",
+						},
+						{
+							PartitionIndex:    1,
+							CommittedOffset:   2,
+							CommittedMetadata: "meta-3-1",
+						},
+					},
+				},
+			},
+		})
+	}
+
+	// Version 6 added:
+	// RequestTopic.RequestPartition.CommitedLeaderEpoch
 	for _, version := range []int16{5, 6} {
 		prototest.TestRequest(t, version, &offsetcommit.Request{
 			GroupID:      "group-3",