update s/w list with QOwnNotes in README

README.md

@@ -15,6 +15,7 @@ This repo provides an Immutable-Infrastructure-as-Code (IIaC) workspace for the
     - [Jupyter Notebook](https://jupyter.org/)
     - [Voilà](https://voila.readthedocs.io/en/stable/index.html)
     - [Pint](https://pint.readthedocs.io/en/stable/)
+- [QOwnNotes](https://www.qownnotes.org/)
 - VS Code with the following extensions (note, auto-updates are disabled)
     - [Python extension by Microsoft](https://marketplace.visualstudio.com/items?itemName=ms-python.python)
     - [Dendron](https://marketplace.visualstudio.com/items?itemName=dendron.dendron)