update readme with latest post

Author: mattmakai

README.md

@@ -7,6 +7,7 @@ Posts and associated code:
 
 |Post|Code Directory|
 |---|---|
+|[Tracking Daily User Data in Django with django-user-visit](https://www.fullstackpython.com/blog/track-daily-user-data-django-user-visit.html)|[track-daily-user-data-django-user-visit](./track-daily-user-data-django-user-visit)|
 |[Quickly Use Bootstrap 4 in a Django Template with a CDN](https://www.fullstackpython.com/blog/bootstrap-4-django-template.html)|[bootstrap-4-django-template](./bootstrap-4-django-template)|
 |[Learning pandas by Exploring COVID-19 Data](https://www.fullstackpython.com/blog/learn-pandas-basic-commands-explore-covid-19-data.html)|[pandas-covid-19](./pandas-covid-19)|
 |[Adding Okta Authentication to an Existing Flask Web App](https://www.fullstackpython.com/blog/okta-user-auth-existing-flask-web-app.html)|[auth-existing-flask-app](./auth-existing-flask-app)|