[v10.0.x] Update set-up-for-high-availability.md (#75457)

Update set-up-for-high-availability.md (#75356)

* Update set-up-for-high-availability.md

Added a note to Enforce the need to setup separately the Alerting HA, as some customers keep opening tickets complaining about duplicate alerts when setting up Grafana HA.

* Update set-up-for-high-availability.md

Corrected note (alerts instead of wueries)

* Update docs/sources/setup-grafana/set-up-for-high-availability.md

Co-authored-by: Christopher Moyer <35463610+chri2547@users.noreply.github.com>

* Update docs/sources/setup-grafana/set-up-for-high-availability.md

Co-authored-by: Christopher Moyer <35463610+chri2547@users.noreply.github.com>

* Update docs/sources/setup-grafana/set-up-for-high-availability.md

* Update docs/sources/setup-grafana/set-up-for-high-availability.md

---------

Co-authored-by: Christopher Moyer <35463610+chri2547@users.noreply.github.com>
(cherry picked from commit 1ff116e85c)

Co-authored-by: Marin N <marinnedea@users.noreply.github.com>

docs/sources/setup-grafana/set-up-for-high-availability.md

@@ -19,6 +19,12 @@ weight: 900
 
 # Set up Grafana for high availability
 
+{{% admonition type="note" %}}
+To prevent duplicate alerts in Grafana high availability, additional steps are required.
+
+Please refer to [Alerting high availability](#alerting-high-availability) for more information.
+{{% /admonition %}}
+
 Grafana uses an embedded sqlite3 database to store users, dashboards, and other persistent data by default. For high availability, you must use a shared database to store this data. This shared database can be either MySQL or Postgres.
 
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