DOC-4416 Copy v1 Prometheus metrics deprecation to deprecations list

Author: rrelledge

content/operate/rs/release-notes/rs-7-8-releases/_index.md

@@ -158,6 +158,10 @@ If your database currently uses triggers and functions, you need to:
 
 - Deprecated [`POST /v1/modules/upgrade/bdb/<uid>`]({{<relref "/operate/rs/references/rest-api/requests/modules/upgrade#post-modules-upgrade-bdb">}}) REST API request. Use [`POST /v1/bdbs/<uid>/upgrade`]({{<relref "/operate/rs/references/rest-api/requests/bdbs/upgrade#post-bdbs-upgrade">}}) to upgrade modules instead.
 
+#### V1 Prometheus metrics deprecation
+
+ V1 Prometheus metrics are deprecated. To transition to the new metrics stream engine, either migrate your existing dashboards using [Prometheus v1 metrics and equivalent v2 PromQL](<!--TODO: Add link-->) now, or wait to use new preconfigured dashboards when they become available in a future release.
+
 #### Download center modules deprecation
 
 New Redis modules will not be available for download from the Redis download center.

content/operate/rs/release-notes/rs-7-8-releases/rs-7-8-2-tba.md

@@ -288,6 +288,10 @@ If your database currently uses triggers and functions, you need to:
 
 - Deprecated [`POST /v1/modules/upgrade/bdb/<uid>`]({{<relref "/operate/rs/references/rest-api/requests/modules/upgrade#post-modules-upgrade-bdb">}}) REST API request. Use [`POST /v1/bdbs/<uid>/upgrade`]({{<relref "/operate/rs/references/rest-api/requests/bdbs/upgrade#post-bdbs-upgrade">}}) to upgrade modules instead.
 
+#### V1 Prometheus metrics deprecation
+
+ V1 Prometheus metrics are deprecated. To transition to the new metrics stream engine, either migrate your existing dashboards using [Prometheus v1 metrics and equivalent v2 PromQL](<!--TODO: Add link-->) now, or wait to use new preconfigured dashboards when they become available in a future release.
+
 #### Download center modules deprecation
 
 New Redis modules will not be available for download from the Redis download center.