Fix another typo

Author: peternewman

_includes/deploy/providers/testfairy.md

@@ -27,7 +27,7 @@ Use the following options to further configure the deployment.
 | `symbols_file` | Path to the symbols file — type: string |
 | `testers_groups` | Tester groups to be notified about this build — type: string, e.g.: e.g. group1,group1 |
 | `notify` | Send an email with a changelog to your users — type: boolean |
-| `auto_update` | Automaticall upgrade all the previous installations of this app this version — type: boolean |
+| `auto_update` | Automatically upgrade all the previous installations of this app this version — type: boolean |
 | `advanced_options` | Comma_separated list of advanced options — type: string, e.g.: option1,option2 |
 
 ### Shared options
@@ -41,4 +41,4 @@ All options can be given as environment variables if prefixed with `TESTFAIRY_`.
 
 For example, `api_key` can be given as `TESTFAIRY_API_KEY=<api_key>`.
 
-{% include deploy/secrets.md name="api_key" env_name="TESTFAIRY_API_KEY" %}
+{% include deploy/secrets.md name="api_key" env_name="TESTFAIRY_API_KEY" %}