Replace cosmiconfig with lilconfig (#15232)

docs/api.md

@@ -66,7 +66,7 @@ If `options.editorconfig` is `true` and an [`.editorconfig` file](https://editor
 
 The promise will be rejected if there was an error parsing the configuration file.
 
-The search starts at `process.cwd()`, or at `filePath` if provided. Please see the [cosmiconfig docs](https://github.com/davidtheclark/cosmiconfig#explorersearch) for details on how the resolving works.
+The search starts at `process.cwd()`, or at `filePath` if provided. Please see the [lilconfig docs](https://github.com/antonk52/lilconfig) for details on how the resolving works.
 
 ```js
 const configFile = await prettier.resolveConfigFile(filePath);

docs/configuration.md

@@ -3,7 +3,7 @@ id: configuration
 title: Configuration File
 ---
 
-Prettier uses [cosmiconfig](https://github.com/davidtheclark/cosmiconfig) for configuration file support. This means you can configure Prettier via (in order of precedence):
+Prettier uses [lilconfig](https://github.com/antonk52/lilconfig) for configuration file support. This means you can configure Prettier via (in order of precedence):
 
 - A `"prettier"` key in your `package.json` file.
 - A `.prettierrc` file written in JSON or YAML.