Update docs/readthedocs/index.rst

Fixing Julian's contact info

Co-authored-by: Daniel Feismann <98817556+danielfeismann@users.noreply.github.com>

Author: sebastian-peter

docs/readthedocs/index.rst

@@ -23,7 +23,7 @@ If you feel, something this missing, wrong or misleading, please contact one of
    * `@danielfeismann <https://github.com/danielfeismann>`_
    * `@sebastian-peter <https://github.com/sebastian-peter>`_
    * `@jo-bao <https://github.com/jo-bao>`_
-@julianhohmann <https://github.com/julianhohmann>`_
+* `@julianhohmann <https://github.com/julianhohmann>`_
 Hat tip to all other contributors!
 
 Indices and tables