[7.17] Update stability.asciidoc (elastic#187294) (elastic#187298)

# Backport

This will backport the following commits from `main` to `7.17`:
- [Update stability.asciidoc
(elastic#187294)](elastic#187294)

<!--- Backport version: 9.4.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

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Co-authored-by: Pius <[email protected]>

docs/developer/best-practices/stability.asciidoc

@@ -29,7 +29,7 @@ access.
 *** We need to make sure security is set up in a specific way for
 non-standard {kib} indices. (create their own custom roles)
 * {kib} running behind a reverse proxy or load balancer, without sticky
-sessions. (we have had many discuss/SDH tickets around this)
+sessions.
 * If a proxy/loadbalancer is running between ES and {kib}
 
 [discrete]
@@ -78,4 +78,4 @@ Does the feature work efficiently on the list of supported browsers?
 * Does the feature affect old indices or saved objects?
 * Has the feature been tested with {kib} aliases?
 * Read/Write privileges of the indices before and after the
-upgrade?
+upgrade?