Update cover

Signed-off-by: Bryan Frimin <bryan@getprobo.com>

Author: gearnode

profile/README.md

@@ -1 +1,7 @@
-[![Probo](cover_v3.png)](https://www.getprobo.com)
+<a href="https://www.getprobo.com">
+  <picture>
+    <source media="(prefers-color-scheme: dark)" srcset="cover_v4_dark.png">
+    <source media="(prefers-color-scheme: light)" srcset="cover_v4_light.png">
+    <img alt="Probo" src="cover_v4_light.png">
+  </picture>
+</a>