docs: update KelkooGroup logo in adopters

Author: gaeljw

README.md

@@ -59,4 +59,4 @@ Support us with a monthly donation and help us continue our activities. [Become
 
 You are using Cucumber Scala? We would love to know about you! Please open a PR to add your project or company to the list below.
 
-<img src="https://4fle1816f3va1wuk891mb5nk-wpengine.netdna-ssl.com/wp-content/uploads/2019/11/logo-1024x189-1.jpg" height="40" /> <img src="https://engineering.teads.com/wp-content/uploads/2019/07/Teads_logo_Black.svg" height="40" /> <img src="https://raw.githubusercontent.com/KelkooGroup/theGardener/master/public/images/logo.png" height="40" />
+<img src="https://www.kelkoogroup.com/wp-content/uploads/2019/11/logo-1024x189-1.jpg" height="40" /> <img src="https://engineering.teads.com/wp-content/uploads/2019/07/Teads_logo_Black.svg" height="40" /> <img src="https://raw.githubusercontent.com/KelkooGroup/theGardener/master/public/images/logo.png" height="40" />