cmd/cgo: use doc link for cgo.Handle

Change-Id: If6af9842f563fe9233de0563d356e925a7b912f8
GitHub-Last-Rev: e8422e9
GitHub-Pull-Request: #76727
Reviewed-on: https://go-review.googlesource.com/c/go/+/727581
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: David Chase <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
Reviewed-by: Sean Liao <[email protected]>
Auto-Submit: Sean Liao <[email protected]>

Author: ariel-anieli

src/cmd/cgo/doc.go

@@ -425,8 +425,8 @@ and of course there is nothing stopping the C code from doing anything
 it likes. However, programs that break these rules are likely to fail
 in unexpected and unpredictable ways.
 
-The runtime/cgo.Handle type can be used to safely pass Go values
-between Go and C. See the runtime/cgo package documentation for details.
+The type [runtime/cgo.Handle] can be used to safely pass Go values
+between Go and C.
 
 Note: the current implementation has a bug. While Go code is permitted
 to write nil or a C pointer (but not a Go pointer) to C memory, the