Fix typo in readme

Author: PabloVD

README.md

@@ -1,6 +1,6 @@
 # DenarioApp
 
-DenarioApp is the GUI for multiagent research assitant system [Denario](https://github.com/AstroPilot-AI/Denario.git), powered by [streamlit](https://streamlit.io).
+DenarioApp is the GUI for multiagent research assistant system [Denario](https://github.com/AstroPilot-AI/Denario.git), powered by [streamlit](https://streamlit.io).
 
 [Test a deployed demo of this app in HugginFace Spaces.](https://huggingface.co/spaces/astropilot-ai/Denario)