update readme link

README.md

@@ -268,9 +268,16 @@ const importers = [
 const sassFile = path.join(__dirname, 'test.scss');
 sassTrue.runSass({ describe, it }, sassFile, { importers });
 ```
-_____
+
+---
+
 ### Sponsor OddBird's OSS Work
 
-At OddBird, we love contributing to the languages & tools developers rely on. We're currently working on polyfills for new Popover & Anchor Positioning functionality, as well as CSS specifications for functions, mixins, and responsive typography. Help us keep this work sustainable and centered on your needs as a developer! We display sponsor logos and avatars on our website.
+At OddBird, we love contributing to the languages & tools developers rely on.
+We're currently working on polyfills for new Popover & Anchor Positioning
+functionality, as well as CSS specifications for functions, mixins, and
+responsive typography. Help us keep this work sustainable and centered on your
+needs as a developer! We display sponsor logos and avatars on our
+[website](https://www.oddbird.net/true/#open-source-sponsors).
 
 [Sponsor OddBird's OSS Work](https://opencollective.com/oddbird-open-source)