[sk8s] Update doc references to prom2.skia.org.

Bug: skia:9602
Change-Id: Id55f0ca113cece9fd3166eb6dd978f52f1fbc5b5
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/264575
Reviewed-by: Ravi Mistry <rmistry@google.com>
diff --git a/golden/docs/PROD.md b/golden/docs/PROD.md
index 8cee6ec..06e9532 100644
--- a/golden/docs/PROD.md
+++ b/golden/docs/PROD.md
@@ -23,7 +23,7 @@
 To determine load of various services, we can use the fact that there are
 `defer metrics2.FuncTimer().Stop()` all around the code base to get a rough idea of QPS/load.
 
-On <https://prom2.skia.org> or <https://skia-prom.corp.goog>, try doing the search:
+On https://thanos-query.skia.org try doing the search:
 
     rate(timer_func_timer_ns_count{appgroup=~"gold.+"}[1m])
 
diff --git a/launch.md b/launch.md
index a43398f..786916c 100644
--- a/launch.md
+++ b/launch.md
@@ -173,8 +173,7 @@
   prometheus.io.port: "20000"
 ```
 
-- Metrics will be available on [prom2.skia.org](https://prom2.skia.org/). Legacy apps report metrics
-to [prom.skia.org](https://prom.skia.org/) and require updating `prometheus/sys/prometheus.yml`.
+- Metrics will be available on [thanos-query.skia.org](https://thanos-query.skia.org/).
 - The metrics will be labeled `app=<foo>` where `foo` is the first argument to
   `common.InitWithMust`.
 - If you have secrets (like a service account), bind it to the deployment by adding