Update badge example to include fox logo

The badge example in the Badge section now matches the header badge
with the fox icon via shields.io's custom logo parameter.

none

Author: peaktwilight

README.md

@@ -121,7 +121,7 @@ npx foxguard@latest secrets .                   # secrets scan
 ### Badge
 
 ```md
-[![foxguard](https://img.shields.io/badge/foxguard-clean-2dd4bf)](https://github.com/peaktwilight/foxguard)
+[![foxguard](https://img.shields.io/badge/foxguard-clean-2dd4bf?logo=data:image/svg%2bxml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCA2NCA2NCIgZmlsbD0ibm9uZSI+PHBhdGggZD0iTTggOEwyMCAyOEwzMiAyMEw0NCAyOEw1NiA4TDUyIDMyTDQ0IDQ0TDM2IDUySDI4TDIwIDQ0TDEyIDMyTDggOFoiIGZpbGw9IiNGNTlFMEIiIGZpbGwtb3BhY2l0eT0iMC4zIiBzdHJva2U9IiNGNTlFMEIiIHN0cm9rZS13aWR0aD0iMyIgc3Ryb2tlLWxpbmVqb2luPSJyb3VuZCIvPjxjaXJjbGUgY3g9IjI0IiBjeT0iMzIiIHI9IjIuNSIgZmlsbD0iI0Y1OUUwQiIvPjxjaXJjbGUgY3g9IjQwIiBjeT0iMzIiIHI9IjIuNSIgZmlsbD0iI0Y1OUUwQiIvPjwvc3ZnPg==)](https://github.com/peaktwilight/foxguard)
 ```
 
 ## Configuration