Newsletter: Add sponsors section to September newsletter

src/content/newsletters/2024-09-30.mdx

@@ -7,6 +7,20 @@ draft: true
 
 Hello\!
 
+### Welcoming new sponsors!
+
+Ladybird is funded entirely by sponsorships and donations from companies and individuals who care about the open web.
+
+In September, we've welcomed the following new sponsors:
+
+- [Guillermo Rauch](https://rauchg.com) with $50,000
+- [Optimising.com.au](https://www.optimising.com.au/?utm_source=ladybird&utm_medium=website&utm_campaign=sponsor) with $1,000
+- [Guillaume Knispel](#) with $1,000
+- [Mark Goetz](https://markandrewgoetz.com/) with $1,000
+- [Broadband Map](https://broadbandmap.com/) with $1,000
+
+Please [contact us](mailto:[email protected]) if you are interested in sponsoring the project.
+
 ### CSS Transitions
 
 This month, Ladybird gained support for the `transition` property, which allows authors to automatically animate changes to CSS properties. A lot of websites use this for subtle effects and it really makes the browser feel more polished. Many thanks to Matthew Olsson who contributed the bulk of this over the past several months.