Change .env.example to .env.sample in Contrib guide
@@ -68,7 +68,7 @@ Thank you! We'll try to get back to you as soon as possible.
4. Create a `.env` file in this directory, and add the connection details for
your databases.
- See [.env.example](.env.example) for an example that should work with a trivial
+ See [.env.sample](.env.sample) for an example that should work with a trivial
local setup.
*Note:* If you didn't specify the MySQL user to be one with elevated
