types/dynamicpb: minor doc change

Change-Id: I13439b810e18142d85f4466be006d3abf3a66c30
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/219502
Reviewed-by: Damien Neil <dneil@google.com>
diff --git a/types/dynamicpb/dynamic.go b/types/dynamicpb/dynamic.go
index 4109128..991624a 100644
--- a/types/dynamicpb/dynamic.go
+++ b/types/dynamicpb/dynamic.go
@@ -100,7 +100,7 @@
 	}
 }
 
-// Range reports whether a field is populated.
+// Has reports whether a field is populated.
 // See protoreflect.Message for details.
 func (m *Message) Has(fd pref.FieldDescriptor) bool {
 	m.checkField(fd)