Update references to 2.8.5 (#10590)

**What this PR does / why we need it**:
We're releasing a new 2.8.5 patch. This adds references to it to our docs.

CHANGELOG.md

@@ -182,6 +182,14 @@
 * [8880](https://github.com/grafana/loki/pull/8880) **JoaoBraveCoding**: Normalize headless service name for query-frontend/scheduler
 * [9978](https://github.com/grafana/loki/pull/9978) ****vlad-diachenko****: replaced deprecated `policy.v1beta1` with `policy.v1`.
 
+## 2.8.5 (2023-09-14)
+
+#### Loki
+
+##### Security
+
+* [10573](https://github.com/grafana/loki/pull/10573) **DylanGuedes**: Bump Docker base images to Alpine version 3.18.3 to mitigate CVE-2022-48174
+
 ## 2.8.3 (2023-07-21)
 
 #### Loki

docs/sources/release-notes/v2-8.md

@@ -22,6 +22,10 @@ As always, please read the [upgrade guide]({{< relref "../setup/upgrade#270" >}}
 
 ## Bug fixes
 
+### 2.8.5 (2023-09-14)
+
+* Update Docker base images to mitigate security vulnerability CVE-2022-48174
+
 ### 2.8.2 (2023-05-03)
 
 * Update Go to 1.20.4 to address security vulnerabilities in the previous Go version.
@@ -34,3 +38,6 @@ As always, please read the [upgrade guide]({{< relref "../setup/upgrade#270" >}}
 * Update go to 1.20.3 to address security vulnerabilities in the previous go version.
 * Update alpine image to 3.16.5 to address security vulnerabilities in the previous version.
 * *Promtail*: Fix journald support in amd64 binary build.
+
+
+For a full list of all changes and fixes, look at the [CHANGELOG](https://github.com/grafana/loki/blob/release-2.8.x/CHANGELOG.md).