chore: update readme

Author: iamkun

README.md

@@ -104,6 +104,10 @@ Support this project by becoming a sponsor. Your logo will show up here with a l
 
 [[Become a sponsor via Github](https://github.com/sponsors/iamkun/)] [[Become a sponsor via OpenCollective](https://opencollective.com/dayjs#sponsor)]
 
+<a href="https://toyokumo.co.jp" target="_blank">
+  <img width="70" src="https://user-images.githubusercontent.com/17680888/197092231-2367b5eb-1e43-467e-a311-23f7cd97b086.png">
+</a>
+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
 <a href="https://github.com/alan-eu" target="_blank">
   <img width="70" src="https://avatars.githubusercontent.com/u/18175329?s=52&v=4">
 </a>
@@ -130,10 +134,11 @@ Please give us a 💖 star 💖 to support us. Thank you.
 
 And thank you to all our backers! 🙏
 
-<a href="https://opencollective.com/dayjs/backer/0/website?requireActive=false" target="_blank"><img src="https://opencollective.com/dayjs/backer/0/avatar.svg?requireActive=false"></a>
-<a href="https://opencollective.com/dayjs/backer/1/website?requireActive=false" target="_blank"><img src="https://opencollective.com/dayjs/backer/1/avatar.svg?requireActive=false"></a>
-<a href="https://opencollective.com/dayjs/backer/2/website?requireActive=false" target="_blank"><img src="https://opencollective.com/dayjs/backer/2/avatar.svg?requireActive=false"></a>
-<a href="https://opencollective.com/dayjs/backer/3/website?requireActive=false" target="_blank"><img src="https://opencollective.com/dayjs/backer/3/avatar.svg?requireActive=false"></a>
+<a href="https://opencollective.com/dayjs/backer/0/website?requireActive=false" target="_blank"><img width="35" src="https://opencollective.com/dayjs/backer/0/avatar.svg?requireActive=false"></a>
+<a href="https://opencollective.com/dayjs/backer/1/website?requireActive=false" target="_blank"><img width="35" src="https://opencollective.com/dayjs/backer/1/avatar.svg?requireActive=false"></a>
+<a href="https://opencollective.com/dayjs/backer/2/website?requireActive=false" target="_blank"><img width="35" src="https://opencollective.com/dayjs/backer/2/avatar.svg?requireActive=false"></a>
+<a href="https://opencollective.com/dayjs/backer/3/website?requireActive=false" target="_blank"><img width="35" src="https://opencollective.com/dayjs/backer/3/avatar.svg?requireActive=false"></a>
+<br />
 <a href="https://opencollective.com/dayjs#backers" target="_blank"><img src="https://opencollective.com/dayjs/contributors.svg?width=890" /></a>
 
 ## License