chore: update readme logo (#22433)

* chore: updating cypress logo in readme

* fixing image

* resizing images

Author: elylucas

README.md

@@ -1,5 +1,11 @@
 <p align="center">
-  <a href="https://www.cypress.io"><img src="https://cloud.githubusercontent.com/assets/1268976/20607953/d7ae489c-b24a-11e6-9cc4-91c6c74c5e88.png"/></a>
+  <a href="https://www.cypress.io">
+    <picture>
+      <source media="(prefers-color-scheme: dark)"  srcset="./assets/cypress-logo-dark.png">
+      <source media="(prefers-color-scheme: light)" srcset="./assets/cypress-logo-light.png">
+      <img alt="Cypress Logo" src="./assets/cypress-logo-light.png">
+    </picture>    
+  </a>
 </p>
 <p align="center">
   <a href="https://on.cypress.io">Documentation</a> |