Fix README

Author: Chuxel

containers/elixir/README.md

@@ -8,14 +8,14 @@ _Develop Elixir based applications. Includes everything you need to get up and r
 | --------------------------- | --------------------- |
 | _Contributors_              | [idyll](https://github.com/idyll), [Talk2MeGooseman](https://github.com/talk2MeGooseman), [krainboltgreene](https://github.com/krainboltgreene)|
 | _Category_                  | Community, Languages  |
-| _Definition type_           | Dockerfile             |
+| _Definition type_           | Dockerfile            |
 | _Works in Codespaces_       | Yes                   |
 | _Container host OS support_ | Linux, macOS, Windows |
-| _Languages, platforms_      | Elixir.               |
+| _Languages, platforms_      | Elixir                |
 
 ## Using this definition
 
-While this definition should work unmodified, you can select the version of Elixir the container uses by updating the `VARIANT` arg in the included `docker-compose.yml`.
+While this definition should work unmodified, you can select the version of Elixir the container uses by updating the `VARIANT` arg in the included `devcontainer.json`.
 
 ```yml
 "args": { "VARIANT": "1.10" }