Add NYC to readme

Author: saketkc

README.md

@@ -23,6 +23,7 @@ Covmuller currently supports the following features:
 * Estimate totals prevalence of variants by projecting case prevalence data on multinomila fits:  
     - [India](https://saket-choudhary.me/covmuller/articles/VariantAnimation-India.html)
     - [New York state](https://saket-choudhary.me/covmuller/articles/VariantAnimation-NewYork.html)
+    - [New York City](https://saket-choudhary.me/covmuller/articles/VariantAnimation-NYC.html)
     - [South Africa](https://saket-choudhary.me/covmuller/articles/VariantAnimation-SouthAfrica.html)
     - [United Kingdom](https://saket-choudhary.me/covmuller/articles/VariantAnimation-UK.html)
     - [USA](https://saket-choudhary.me/covmuller/articles/VariantAnimation-USA.html)