Update releases page for 5.8 (#702)

The PR updates releases page for v5.8

Author: MaedahBatool

docs/releases.mdx

@@ -12,11 +12,12 @@ Currently supported versions of Sourcegraph:
 
 | **Release**                     | **General Availability Date** | **Supported** | **Release Notes**                                        | **Install**                                          |
 |---------------------------------|-------------------------------|---------------|----------------------------------------------------------|------------------------------------------------------|
-| Sourcegraph 5 Release 7 Patch 1 | September 2024                | ✅             | [Notes](https://sourcegraph.com/docs/CHANGELOG#v572474)  | [Install](https://sourcegraph.com/docs/admin/deploy) |
-| Sourcegraph 5 Release 7         | September 2024                | ✅             | [Notes](https://sourcegraph.com/docs/CHANGELOG#v570)     | [Install](https://sourcegraph.com/docs/admin/deploy) |
-| Sourcegraph 5 Release 6 Patch 2 | August 2024                   | ✅             | [Notes](https://sourcegraph.com/docs/CHANGELOG#v562535)  | [Install](https://sourcegraph.com/docs/admin/deploy) |
-| Sourcegraph 5 Release 6 Patch 1 | August 2024                   | ✅             | [Notes](https://sourcegraph.com/docs/CHANGELOG#v56185)   | [Install](https://sourcegraph.com/docs/admin/deploy) |
-| Sourcegraph 5 Release 6         | August 2024                   | ✅             | [Notes](https://sourcegraph.com/docs/CHANGELOG#v560)     | [Install](https://sourcegraph.com/docs/admin/deploy) |
+| 5.8 | October 2024                | ✅             | [Notes](https://sourcegraph.com/docs/CHANGELOG#v580)  | [Install](https://sourcegraph.com/docs/admin/deploy) |
+| 5.7.1 | September 2024                | ✅             | [Notes](https://sourcegraph.com/docs/CHANGELOG#v572474)  | [Install](https://sourcegraph.com/docs/admin/deploy) |
+| 5.7         | September 2024                | ✅             | [Notes](https://sourcegraph.com/docs/CHANGELOG#v570)     | [Install](https://sourcegraph.com/docs/admin/deploy) |
+| 5.6.2 | August 2024                   | ✅             | [Notes](https://sourcegraph.com/docs/CHANGELOG#v562535)  | [Install](https://sourcegraph.com/docs/admin/deploy) |
+| 5.6.1 | August 2024                   | ✅             | [Notes](https://sourcegraph.com/docs/CHANGELOG#v56185)   | [Install](https://sourcegraph.com/docs/admin/deploy) |
+| 5.6         | August 2024                   | ✅             | [Notes](https://sourcegraph.com/docs/CHANGELOG#v560)     | [Install](https://sourcegraph.com/docs/admin/deploy) |
 | 5.5                             | July 2024                     | ✅             | [Notes](https://sourcegraph.com/docs/CHANGELOG#v553956)  | [Install](https://sourcegraph.com/docs/admin/deploy) |
 | 5.4                             | May 2024                      | ✅             | [Notes](https://sourcegraph.com/docs/CHANGELOG#v547765)  | [Install](https://sourcegraph.com/docs/admin/deploy) |
 | 5.3                             | February 2024                 | ✅             | [Notes](https://sourcegraph.com/docs/CHANGELOG#v5312303) | [Install](https://sourcegraph.com/docs/admin/deploy) |