design/go2draft-type-parameters: correct method name in code comment

Change-Id: I5da909db243daea6e8e1ec0898c42b73d426764b
Reviewed-on: https://go-review.googlesource.com/c/proposal/+/240577
Reviewed-by: Robert Griesemer <gri@golang.org>
diff --git a/design/go2draft-type-parameters.md b/design/go2draft-type-parameters.md
index 9669547..a215340 100644
--- a/design/go2draft-type-parameters.md
+++ b/design/go2draft-type-parameters.md
@@ -2173,7 +2173,7 @@
 ```Go
 package p1
 
-// S is a type with a parameterized method M.
+// S is a type with a parameterized method Identity.
 type S struct{}
 
 // Identity is a simple identity method that works for any type.