Add .yml to list of recognised file extensions.

Author: 01mf02

docs/cli.dj

@@ -44,7 +44,7 @@ Possible values of _FORMAT_ include:
 
 jaq automatically chooses the corresponding input format for
 files with the extensions
-`.json`, `.yaml`, `.cbor`, `.toml`, `.xml`, `.xhtml`, `.csv`, `.tsv`.
+`.json`, `.yaml`, `.yml`, `.cbor`, `.toml`, `.xml`, `.xhtml`, `.csv`, `.tsv`.
 That means that
 `jaq --from cbor . myfile.cbor` is equivalent to
 `jaq . myfile.cbor`.