Revise API description for clarity

The `build_timeout` description was unclear, listing both minutes
and seconds.

doc/api/projects.md

@@ -1061,7 +1061,7 @@ POST /projects
 | `avatar`                                                    | mixed   | **{dotted-circle}** No | Image file for avatar of the project.                |
 | `build_coverage_regex`                                      | string  | **{dotted-circle}** No | Test coverage parsing. |
 | `build_git_strategy`                                        | string  | **{dotted-circle}** No | The Git strategy. Defaults to `fetch`. |
-| `build_timeout`                                             | integer | **{dotted-circle}** No | The maximum amount of time in minutes that a job is able run (in seconds). |
+| `build_timeout`                                             | integer | **{dotted-circle}** No | The maximum amount of time, in seconds, that a job can run. |
 | `builds_access_level`                                       | string  | **{dotted-circle}** No | One of `disabled`, `private`, or `enabled`. |
 | `ci_config_path`                                            | string  | **{dotted-circle}** No | The path to CI configuration file. |
 | `container_expiration_policy_attributes`                    | hash    | **{dotted-circle}** No | Update the image cleanup policy for this project. Accepts: `cadence` (string), `keep_n` (integer), `older_than` (string), `name_regex` (string), `name_regex_delete` (string), `name_regex_keep` (string), `enabled` (boolean). |