repos: enable CSR mirroring for x/pkgsite

Change-Id: I82111c4442aa4b711bedfb9aad43c59ff663d0a9
Reviewed-on: https://go-review.googlesource.com/c/build/+/360721
Trust: Jamal Carvalho <jamal@golang.org>
Run-TryBot: Jamal Carvalho <jamal@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>

repos/repos.go

@@ -79,7 +79,7 @@ func init() {
 	x("net", desc("additional networking packages"))
 	x("oauth2")
 	x("perf", desc("packages and tools for performance measurement, storage, and analysis"))
-	x("pkgsite", desc("home of the pkg.go.dev website"), noBuildAndNoDash)
+	x("pkgsite", desc("home of the pkg.go.dev website"), noBuildAndNoDash, enableCSR("go-discovery"))
 	x("playground", noDash, enableCSR("golang-org"))
 	x("review", desc("a tool for working with Gerrit code reviews"))
 	x("scratch", noDash)