Update ubuntu openssh link

Author: mattwojo

WSL/troubleshooting.md

@@ -296,7 +296,7 @@ Trying to connect your SSH server is failed with the following error: "Connectio
    ```
 
    and you've followed this tutorial:
-   https://help.ubuntu.com/lts/serverguide/openssh-server.html.en
+   https://ubuntu.com/server/docs/service-openssh
 
 2. Stop the sshd service and start sshd in debug mode:
 
@@ -374,4 +374,4 @@ Some distributions [available in Microsoft Store](install-win10.md#step-6---inst
 
 ### Unable to boot after installing WSL 2
 
-We are aware of an issue affecting users where they are unable to boot after installing WSL 2. While we fully diagnose those issue, users have reported that [changing the buffer size](https://github.com/microsoft/WSL/issues/4784#issuecomment-639219363) or [installing the right drivers](https://github.com/microsoft/WSL/issues/4784#issuecomment-675702244) can help address this. Please view this [Github issue](https://github.com/microsoft/WSL/issues/4784) to see the latest updates on this issue. 
+We are aware of an issue affecting users where they are unable to boot after installing WSL 2. While we fully diagnose those issue, users have reported that [changing the buffer size](https://github.com/microsoft/WSL/issues/4784#issuecomment-639219363) or [installing the right drivers](https://github.com/microsoft/WSL/issues/4784#issuecomment-675702244) can help address this. Please view this [Github issue](https://github.com/microsoft/WSL/issues/4784) to see the latest updates on this issue.