devapp/owners: add khr as hash/maphash owner

Updates golang/go#28322.

Change-Id: I025b9a9de1273c9a81f0e2d00e890337ed21a59b
Reviewed-on: https://go-review.googlesource.com/c/build/+/220518
Run-TryBot: Dmitri Shuralyov <[email protected]>
TryBot-Result: Gobot Gobot <[email protected]>
Reviewed-by: Keith Randall <[email protected]>

Author: dmitshur

devapp/owners/table.go

@@ -341,6 +341,9 @@ var entries = map[string]*Entry{
 		Primary:   []Owner{gri},
 		Secondary: []Owner{adonovan},
 	},
+	"go/src/hash/maphash": {
+		Primary: []Owner{khr},
+	},
 	"go/src/html/template": {
 		Primary:   []Owner{mikesamuel},
 		Secondary: []Owner{empijei},