chore(readme): update logos of our sponsors

Author: neSpecc

README.md

@@ -20,10 +20,13 @@ If you like Editor.js you can support project improvements and development of ne
 
 ### Sponsors
 
-Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [[Become a sponsor](https://opencollective.com/editorjs#sponsor)]
+Support us by becoming a sponsor. Your logo will show up here with a link to your website. [[Become a sponsor](https://opencollective.com/editorjs/contribute/sir-8679/checkout)]
+
+<a href="https://humm.earth/" target="_blank"><img src="https://images.opencollective.com/hummearth/2a8406a/logo/256.png" width="64"></a>
+<a href="https://tesen.com/" target="_blank"><img src="https://images.opencollective.com/tesen-media-inc/b90cf6a/logo/256.png" width="64"></a>
+<a href="https://slid.cc/" target="_blank"><img src="https://images.opencollective.com/slid_team/ff564d7/logo/256.png" width="64"></a>
+
 
-<a href="https://opencollective.com/editorjs/sponsor/0/website" target="_blank"><img src="https://opencollective.com/editorjs/sponsor/0/avatar.svg"></a>
-<a href="https://opencollective.com/editorjs/sponsor/3/website" target="_blank"><img src="https://opencollective.com/editorjs/sponsor/3/avatar.svg"></a>
 
  ### Backers