docs(readme): add description for command options

oscard0m · oscard0m · commit 529445f0a0af · 2021-03-07T12:03:14.000+01:00
diff --git a/README.md b/README.md
@@ -13,7 +13,8 @@ npx octoherd-script-watch-unwatch-or-ignore \
   "oscard0m/*"
 ```
 
-The script has no options
+Add `--ignore` flag to ignore notifications for selected repositories
+Add `--unwatch` flag to unwatch selected repositories
 
 ## Contributing
 
