cmd/prober: update URLs

The URLs for the prober are updated to match the new URL scheme.

Change-Id: Ieb6f3997111c6ef130a9db5436a460c072f5031a
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/280703
Trust: Julie Qiu <julie@golang.org>
Run-TryBot: Julie Qiu <julie@golang.org>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jamal Carvalho <jamal@golang.org>
diff --git a/cmd/prober/main.go b/cmd/prober/main.go
index 1929372..3f305cb 100644
--- a/cmd/prober/main.go
+++ b/cmd/prober/main.go
@@ -70,15 +70,6 @@
 		BypassCache: true,
 	},
 	{
-		Name:        "pkg-firestore-readme",
-		RelativeURL: "cloud.google.com/go/firestore?tab=readme",
-	},
-	{
-		Name:        "pkg-firestore-readme-nocache",
-		RelativeURL: "cloud.google.com/go/firestore?tab=readme",
-		BypassCache: true,
-	},
-	{
 		Name:        "pkg-firestore-versions",
 		RelativeURL: "cloud.google.com/go/firestore?tab=versions",
 	},
@@ -134,18 +125,18 @@
 		BypassCache: true,
 	},
 	{
-		Name:        "mod-xtools-nocache",
-		RelativeURL: "mod/golang.org/x/tools",
+		Name:        "xtools-nocache",
+		RelativeURL: "golang.org/x/tools",
 		BypassCache: true,
 	},
 	{
-		Name:        "mod-xtools-packages-nocache",
-		RelativeURL: "mod/golang.org/x/tools?tab=packages",
+		Name:        "xtools-versions-nocache",
+		RelativeURL: "golang.org/x/tools?tab=versions",
 		BypassCache: true,
 	},
 	{
-		Name:        "mod-xtools-versions-nocache",
-		RelativeURL: "mod/golang.org/x/tools?tab=versions",
+		Name:        "xtools-licenses-nocache",
+		RelativeURL: "golang.org/x/tools?tab=licenses",
 		BypassCache: true,
 	},
 	{