Add links to enable virgl topic

howto/anbox/landing.md

@@ -4,4 +4,4 @@ The following guides are available:
 
 * [How to develop a platform plugin](https://discourse.ubuntu.com/t/how-to-develop-a-platform-plugin/33099)
 * [How to develop an addon](https://discourse.ubuntu.com/t/develop-and-test-addons-in-development-mode/36914)
-* [How to enable support for VirGL](TBD)
+* [How to enable support for VirGL](https://discourse.ubuntu.com/t/how-to-enable-virgl/42426)

index.md

@@ -118,7 +118,7 @@ Thinking about using Anbox Cloud for your next project? [Get in touch!](https://
 | 2 | howto/anbox/landing | [Work with the Anbox runtime](https://discourse.ubuntu.com/t/how-to-work-with-the-anbox-runtime/33098) |
 | 3 | howto/anbox/develop-platform | [Develop a platform plugin](https://discourse.ubuntu.com/t/how-to-develop-a-platform-plugin/33099) |
 | 3 | howto/anbox/develop-addon | [Develop and test addons](https://discourse.ubuntu.com/t/develop-and-test-addons-in-development-mode/36914) |
-| 3 | howto/anbox/enable-virgl | [Enable VirGL](TBD) |
+| 3 | howto/anbox/enable-virgl | [Enable VirGL](https://discourse.ubuntu.com/t/how-to-enable-virgl/42426) |
 | 2 | howto/troubleshoot/landing | [Troubleshoot Anbox Cloud](https://discourse.ubuntu.com/t/how-to-troubleshoot-anbox-cloud/17837)|
 | 3 | howto/troubleshoot/initial-setup | [Troubleshoot initial setup](https://discourse.ubuntu.com/t/troubleshoot-issues-with-initial-setup/35704)|
 | 3 | howto/troubleshoot/logs | [View logs](https://discourse.ubuntu.com/t/managing-logs/17771)|