Update slightly the contribution document.

CONTRIBUTING.md

 # dav1d contribution guide
 
 ## CoC
-The [VideoLAN Code of Conduct](https://wiki.videolan.org/CoC) applies to this project.
+The [VideoLAN Code of Conduct](https://wiki.videolan.org/CoC) applies fully to this project.
 
 ## ToDo
 
-Todo list can be found [on the wiki](https://code.videolan.org/videolan/dav1d/wikis/task-list).
+The todo list can be found [on the wiki](https://code.videolan.org/videolan/dav1d/wikis/task-list).
 
 ## Codebase language
 
@@ -20,7 +20,7 @@ For the library:
 For the tools and utils:
 - C *(see above for restrictions)*
 - Rust
-- C++ only for the MFT.
+- C++ is only allowed for the MFT.
 
 If you want to use *Threads* or *Atomic* features, please conform to the **C11**/**POSIX** semantic and use a wrapper for older compilers/platforms *(like done in VLC)*.
 
@@ -42,12 +42,15 @@ Please read [How to Write a Git Commit Message](https://chris.beams.io/posts/git
 
 ## Submit requests (WIP)
 
-- Code
-- Check [code style](https://code.videolan.org/videolan/dav1d/wikis/Coding-style)
-- Test
-- Try
-- Submit patches
+- Code,
+- [Compile](https://xkcd.com/303/),
+- Check your [code style](https://code.videolan.org/videolan/dav1d/wikis/Coding-style),
+- Test,
+- Try,
+- Submit patches through merge requests,
+- Check that this passes the CI.
 
 ## Patent license
 
 You need to read, understand, and agree to the [AV1 patents license](doc/PATENTS), before committing.
+