jiri-test/internal/test: use v23agentd instead of agentd in regression test

Change-Id: I92b597dce2a37e3853810a7dcdbb17574ddb1659
diff --git a/jiri-test/internal/test/go.go b/jiri-test/internal/test/go.go
index c0e9481..59d875b 100644
--- a/jiri-test/internal/test/go.go
+++ b/jiri-test/internal/test/go.go
@@ -1832,12 +1832,12 @@
 		Sets: []binSet{
 			{
 				Name:     "agent-only",
-				Binaries: []string{"agentd"},
+				Binaries: []string{"v23agentd"},
 			},
 			{
 				Name: "prod-services",
 				Binaries: []string{
-					"agentd",
+					"v23agentd",
 					"deviced",
 					"applicationd",
 					"binaryd",