[HttpClient] List Prisma Media as backer of version 6.1

Author: nicolas-grekas

src/Symfony/Component/HttpClient/README.md

@@ -3,6 +3,23 @@ HttpClient component
 
 The HttpClient component provides powerful methods to fetch HTTP resources synchronously or asynchronously.
 
+Sponsor
+-------
+
+The Httpclient component for Symfony 6.1 is [backed][1] by [Prisma Media][2].
+
+Prisma Media has become in 40 years the n°1 French publishing group, on print and
+digitally, with 20 flagship brands of the news magazines : Femme Actuelle, GEO,
+Capital, Gala or Télé-Loisirs… Today, more than 42 million French people are in
+contact with one of our brand each month, either by leafing through a magazine,
+surfing the web, subscribing one our mobile or tablet application or listening to
+our podcasts' series. Prisma Media has successfully transformed one's business
+model : from a historic player in the world of paper, it has become in 5 years
+one of the first publishers of multi-media editorial content, and one of the
+first creators of digital solutions.
+
+Help Symfony by [sponsoring][3] its development!
+
 Resources
 ---------
 
@@ -11,3 +28,7 @@ Resources
  * [Report issues](https://github.com/symfony/symfony/issues) and
    [send Pull Requests](https://github.com/symfony/symfony/pulls)
    in the [main Symfony repository](https://github.com/symfony/symfony)
+
+[1]: https://symfony.com/backers
+[2]: https://www.prismamedia.com
+[3]: https://symfony.com/sponsor