feat: add heroku with caddy

Author: wurstbrot

README.md

@@ -157,7 +157,7 @@ Multilanguage support is not given currently and not planned.
 
 [![Apprio Inc](https://github.com/wurstbrot/DevSecOps-MaturityModel/raw/master-old/assets/images/Apiiro_black_logo.png)](https://apiiro.com/)
 
-[![Heroku (hosting)](https://github.com/wurstbrot/DevSecOps-MaturityModel/raw/master-old/assets/images/sponsors/heroku.png)](https://www.heroku.com/open-source-credit-program)
+[![Heroku (hosting)](https://github.com/wurstbrot/DevSecOps-MaturityModel/raw/master/src/assets/images/sponsors/heroku.png)](https://www.heroku.com/open-source-credit-program)
 
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