Elixir: Add `receive`` keyword to keyword list

[solar05]

Check for existing issues

• [X] Completed

Describe the feature

Zed's highlight system does not highlight receive as a keyword, that used for work with processes.

If applicable, add mockups / screenshots to help present your vision of the feature

No response

[blakedietz]

If I were to guess this is probably an issue in https://github.com/elixir-lang/tree-sitter-elixir.