docs: pull who uses Renovate image into main repo (#29003)

Co-authored-by: Michael Kriese <michael.kriese@visualon.de>

docs/usage/index.md

@@ -76,7 +76,7 @@ Renovate works on these platforms:
 
 Renovate is used by:
 
-![Renovate Matrix](https://app.renovatebot.com/images/matrix.png){ loading=lazy }
+![Renovate Matrix](./assets/images/matrix.png){ loading=lazy }
 
 ## Ways to run Renovate
 

readme.md

@@ -45,7 +45,7 @@ Renovate works on these platforms:
 
 Renovate is widely used in the developer community:
 
-![Renovate Matrix](https://app.renovatebot.com/images/matrix.png)
+![Renovate Matrix](./docs/usage/assets/images/matrix.png)
 
 ## Renovate OSS Insights