Update release-downloads.md and enterprise-v2.8.md for v2.8.6 (#564)

Author: kuiliu88

docs/enterprise-v2.8.md

@@ -32,6 +32,30 @@ Key highlights of this release:
 ## Releases
 We recommend using stable releases for production deployment. Engineering builds are available for testing and evaluation purposes.
 
+### 2.8.6 (Public GA) {#2_8_6}
+Released on 11-05-2025. Installation options:
+* For Linux or Mac users: `curl https://install.timeplus.com/2.8 | sh` [Downloads](/release-downloads#2_8_6)
+* For Kubernetes users: helm install timeplus/timeplus-enterprise --version v7.0.27 ..
+* For Docker users (not recommended for production): `docker run -p 8000:8000 docker.timeplus.com/timeplus/timeplus-enterprise:2.8.6`
+
+Component versions:
+* timeplusd 2.8.31
+* timeplus_web 2.8.18
+* timeplus_appserver 2.8.12
+* timeplus_connector 2.8.1
+* timeplus cli 2.8.0
+
+#### Changelog {#changelog_2_8_6}
+Compared to the [2.8.5](#2_8_5) release:
+* timeplusd 2.8.30 -> 2.8.31
+  * Bugfixes
+    *   Fixed Pulsar message key issue
+    *   Fixed parsing of numbers as strings in JSON input formats
+    *   Fixed issue in emptylist for Mutable stream historical query
+    *   Fixed issue for delete mutable stream
+    *   Fixed issue in streaming distinct processing
+    *   Fixed issue of hybrid hash table in stream join table
+
 ### 2.8.5 (Public GA) {#2_8_5}
 Released on 10-24-2025. Installation options:
 * For Linux or Mac users: `curl https://install.timeplus.com/2.8 | sh` [Downloads](/release-downloads#2_8_5)

docs/release-downloads.md

@@ -16,6 +16,12 @@ Released on 09-25-2025 ([Change logs](/enterprise-v3.0#3_0_1-preview_2)).
 
 ## 2.8 {#2_8}
 
+### v2.8.6 {#2_8_6}
+Released on 11-05-2025 ([Change logs](/enterprise-v2.8#2_8_6)).
+
+* Bare metal installation: [Linux x86_64](https://d.timeplus.com/timeplus-enterprise-v2.8.6-linux-amd64.tar.gz) | [Linux ARM64](https://d.timeplus.com/timeplus-enterprise-v2.8.6-linux-arm64.tar.gz) | [macOS x86_64](https://d.timeplus.com/timeplus-enterprise-v2.8.6-darwin-amd64.tar.gz) | [macOS ARM64](https://d.timeplus.com/timeplus-enterprise-v2.8.6-darwin-arm64.tar.gz)
+* All-in-one Docker image (not recommended for production): `docker run -p 8000:8000 docker.timeplus.com/timeplus/timeplus-enterprise:2.8.6`
+
 ### v2.8.5 {#2_8_5}
 Released on 10-24-2025 ([Change logs](/enterprise-v2.8#2_8_5)).