Remove unneeded underscore from Readme (#2003)

Author: MrSarno

readme.md

@@ -169,7 +169,7 @@ You can customize the appearance of your `Stats Card` or `Repo Card` however you
 - `theme` - name of the theme, choose from [all available themes](./themes/README.md)
 - `cache_seconds` - set the cache header manually _(min: 7200, max: 86400)_
 - `locale` - set the language in the card _(e.g. cn, de, es, etc.)_
-- `border_radius` - Corner rounding on the card_
+- `border_radius` - Corner rounding on the card
 
 > Note: The minimum of cache_seconds is currently 4 hours as a temporary fix for PATs exhaustion.