feat: Show sponsoring of Roche (#6790)

Without this, it's not necessarily obvious that Roche is
spending time and money to make the ecosystem sustainable.

This is a way to make it clear/official.

Signed-off-by: Jean-Philippe Evrard <jean-philippe.evrard+rochepub@external.roche.com>

README.md

@@ -66,6 +66,7 @@ You can find the roadmap in our documentation: https://external-secrets.io/lates
 
 ## Sponsored by
 
+![Roche](assets/Roche_logo_blue_200px.png)
 ![External Secrets Inc.](assets/ESI_Logo.svg)
 ![Container Solutions](assets/CS_logo_1.png)
 ![Form 3](assets/form3_logo.png)

docs/index.md

@@ -1,5 +1,6 @@
 # [Sponsored by](https://opencollective.com/external-secrets-org)
 
+[![Roche](./pictures/Roche_logo_blue_200px.png)](https://www.roche.com/)
 [![cs-logo](./pictures/cs_logo.png)](https://container-solutions.com)
 [![External Secrets inc.](./pictures/ESI_Logo.svg)](https://externalsecrets.com)
 [![Form3](./pictures/form3_logo.png)](https://www.form3.tech/)