Fix legacy versions (#1097)

- https://sourcegraph.slack.com/archives/C01DXLN3D0T/p1745503697479829

Author: MaedahBatool

docs/legacy.mdx

@@ -11,14 +11,14 @@
 
 <Accordion title="Sourcegraph 5.X">
 
-  - [5.11](https://5.11.sourcegraph.com/docs)
+  - [5.11](https://5.11.sourcegraph.com/)
   - [5.10](https://5.10.sourcegraph.com/)
   - [5.9](https://5.9.sourcegraph.com/)
   - [5.8](https://5.8.sourcegraph.com/)
   - [5.7](https://5.7.sourcegraph.com/)
   - [5.6](https://5.6.sourcegraph.com/)
   - [5.5](https://5.5.sourcegraph.com/)
-  - [5.4](https://5.4.sourcegraph.com/docs)
+  - [5.4](https://5.4.sourcegraph.com)
   - [5.3](https://5.3.sourcegraph.com/)
   - [5.2](https://5.2.sourcegraph.com/)
   - [5.1](https://docs.sourcegraph.com/@5.1/)