Docs: adds note on aurora incompatibility (#56621)

* Docs: adds note on aurora incompatibility

* updates with feedback

* adds issue link

docs/sources/setup-grafana/installation/_index.md

@@ -58,8 +58,8 @@ By default, Grafana installs with and uses SQLite, which is an embedded database
 Grafana will support the versions of these databases that are officially supported by the project at the time of a Grafana version's release. When a version becomes unsupported, Grafana may also drop support for that version. See the links above for the support policies for each project.
 
 > **Note:** PostgreSQL versions 10.9, 11.4, and 12-beta2 are affected by a bug (tracked by the PostgreSQL project as [bug #15865](https://www.postgresql.org/message-id/flat/15865-17940eacc8f8b081%40postgresql.org)) which prevents those versions from being used with Grafana. The bug has been fixed in more recent versions of PostgreSQL.
->
 > Grafana can report errors when relying on read-only MySQL servers, such as in high-availability failover scenarios or serverless AWS Aurora MySQL. This is a known issue; for more information, see [issue #13399](https://github.com/grafana/grafana/issues/13399).
+> AWS Aurora MySQL is not compatible with Grafana Alerting, see [issue #54556](https://github.com/grafana/grafana/issues/54556).
 
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