docs: document that .cjs extensions are supported for config files (#…

…2547)

docs/usage/configuration.md

@@ -12,8 +12,8 @@ Additionally, metadata of Git tags generated by **semantic-release** can be cust
 ## Configuration file
 
 **semantic-release**’s [options](#options), mode and [plugins](plugins.md) can be set via either:
-- A `.releaserc` file, written in YAML or JSON, with optional extensions: .`yaml`/`.yml`/`.json`/`.js`
-- A `release.config.js` file that exports an object
+- A `.releaserc` file, written in YAML or JSON, with optional extensions: `.yaml`/`.yml`/`.json`/`.js`/`.cjs`
+- A `release.config.(js|cjs)` file that exports an object
 - A `release` key in the project's `package.json` file
 
 Alternatively, some options can be set via CLI arguments.
@@ -45,7 +45,7 @@ $ semantic-release --branches next
 
 **Note**: Plugin options cannot be defined via CLI arguments and must be defined in the configuration file.
 
-**Note**: When configuring via `package.json`, the configuration must be under the `release` property. However, when using a `.releaserc` or a `release.config.js` file, the configuration must be set without a `release` property.
+**Note**: When configuring via `package.json`, the configuration must be under the `release` property. However, when using a `.releaserc` or a `release.config` file, the configuration must be set without a `release` property.
 
 ## Options