Update environment-variables.md

Small grammar fix.
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Scott Walters
2020-04-19 06:58:12 -07:00
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@@ -71,7 +71,7 @@ dokku config:export --format shell node-js-app
## Special Config Variables
The following list config variables have special meaning and can be set in a variety of ways.
The following config variables have special meanings and can be set in a variety of ways.
> Warning: This list is not exhaustive, and may vary from version to version.