[UPD] addons table in README.md

Author: OCA-git-bot

README.md

@@ -21,7 +21,7 @@ Available addons
 ----------------
 addon | version | maintainers | summary
 --- | --- | --- | ---
-[webservice](webservice/) | 15.0.1.0.3 | [![etobella](https://github.com/etobella.png?size=30px)](https://github.com/etobella) | Defines webservice abstract definition to be used generally
+[webservice](webservice/) | 15.0.1.0.3 | <a href='https://github.com/etobella'><img src='https://github.com/etobella.png' width='32' height='32' style='border-radius:50%;' alt='etobella'/></a> | Defines webservice abstract definition to be used generally
 
 [//]: # (end addons)