Fix typo (travis-ci#1890)

Author: chrisirhc

user/deployment.md

@@ -79,7 +79,7 @@ Use the following options to configure conditional deployment:
 * `jdk`, `node`, `perl`, `php`, `python`, `ruby`, `scala`, `go`: for    language runtimes that support multiple versions,
    you can limit the deployment to happen only on the job that matches a specific version.
 
-* `condition`: deploy when *a single* bash condition evaluates to `true`. This must be a string value, and is equivalant to `if [[ <condition> ]]; then <deploy>; fi`. For example, `$CC = gcc`.
+* `condition`: deploy when *a single* bash condition evaluates to `true`. This must be a string value, and is equivalent to `if [[ <condition> ]]; then <deploy>; fi`. For example, `$CC = gcc`.
 
 * `tags` can be `true`, `false` or any other string: