Add Ergonaut One S teaser image

Author: krikun98

docs/guides/small_layouts.md

@@ -11,7 +11,7 @@ The two outer columns allow one to place dedicated modifiers and all alpha keys
 
 But what if we were to remove those outer columns?
 
-![Small teaser...](/img/small_layouts/one_s.jpg)
+![Small teaser...](/img/small_layouts/eones.jpeg)
 
 A smaller layout introduces two main challenges:
 - Not all alpha keys (letters) may fit on the main layer (especially for Cyrillic languages)