owners: add andybons and rakoczy as primaries for playground

Change-Id: I1927873a2008097440c9dfd7263106b5af0abdf3
Reviewed-on: https://go-review.googlesource.com/c/build/+/234477
Run-TryBot: Andrew Bonventre <andybons@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>
diff --git a/devapp/owners/table.go b/devapp/owners/table.go
index 2e7ece4..a319f5d 100644
--- a/devapp/owners/table.go
+++ b/devapp/owners/table.go
@@ -852,7 +852,7 @@
 	},
 
 	"playground": {
-		Secondary: []Owner{},
+		Primary: []Owner{andybons, rakoczy},
 	},
 
 	"vscode-go": {