docs(readme): Include corn

Author: epage

README.md

@@ -10,7 +10,7 @@
 
  - Set defaults
  - Set explicit values (to programmatically override)
- - Read from [JSON], [TOML], [YAML], [INI], [RON], [JSON5] files
+ - Read from [JSON], [TOML], [YAML], [INI], [RON], [JSON5], [CORN] files
  - Read from environment
  - Loosely typed — Configuration values may be read in any supported type, as long as there exists a reasonable conversion
  - Access nested fields using a formatted path — Uses a subset of JSONPath; currently supports the child ( `redis.port` ) and subscript operators ( `databases[0].name` )
@@ -21,6 +21,7 @@
 [INI]: https://github.com/zonyitoo/rust-ini
 [RON]: https://github.com/ron-rs/ron
 [JSON5]: https://github.com/callum-oakley/json5-rs
+[CORN]: https://cornlang.dev/
 
 Please note that this library can not be used to write changed configuration
 values back to the configuration file(s)!
@@ -35,6 +36,7 @@ values back to the configuration file(s)!
  - `toml` - Adds support for reading TOML files
  - `ron` - Adds support for reading RON files
  - `json5` - Adds support for reading JSON5 files
+ - `corn` - Adds support for reading Corn files
 
 ### Support for custom formats