Update 2.8.5 Release notes - added 2 bug fixes that we missed to mention (#1208)

Author: LiorKogan

content/operate/oss_and_stack/stack-with-enterprise/release-notes/redisbloom/redisbloom-2.8-release-notes.md

@@ -37,6 +37,8 @@ Details:
   - [#843](https://github.com/redisbloom/redisbloom/pull/843) `CF.RESERVE` crashes (OOM) on huge initialization values (MOD-7058)
   - [#843](https://github.com/redisbloom/redisbloom/pull/843) `TOPK.RESERVE` crashes (OOM) on huge initialization values (MOD-7059)
   - [#843](https://github.com/redisbloom/redisbloom/pull/843) `CMS.INITBYDIM` and `CMS.INITBYPROB` crash (OOM) on huge initialization values (MOD-7060)
+  - [#828](https://github.com/redisbloom/redisbloom/pull/828) `CMS.INCRBY` does not notify `WATCH`ers or client-side caching (MOD-8193)
+  - [#827](https://github.com/redisbloom/redisbloom/pull/827) Top-K - suboptimal results after RDB load due to missing initialization (MOD-8194)
 
 - Improvements:
   - [#801](https://github.com/redisbloom/redisbloom/pull/801) Support active memory defragmentation (MOD-7890)