Remove a bit the space above the button

Author: kzu

docs/footer.md

@@ -2,10 +2,10 @@
 
 <!-- include sponsors.md -->
 
-<br><br>
+<br>&nbsp;
 <a href="https://github.com/sponsors/devlooped" title="Sponsor this project">
   <img src="https://github.com/devlooped/sponsors/blob/main/sponsor.png" />
 </a>
 <br>
 
-[Learn more about GitHub Sponsors](https://github.com/sponsors)
+[Learn more about GitHub Sponsors](https://github.com/sponsors)