Update: README.

Author: ya7010

README.md

@@ -12,7 +12,7 @@
     </a>
 </p>
 
-`cmdcomp` generate shell completion file (bash or zsh) from config yaml/toml file.
+`cmdcomp` generate shell completion file (`bash` or `zsh`) from config `json`/`yaml`/`toml` file.
 
 ## Install