docs: fix resend logo in dark mode in providers page (#11219)

Author: dhairyathedev

docs/pages/getting-started/providers/resend.mdx

@@ -1,7 +1,7 @@
 import { Callout, Tabs } from "nextra/components"
 import { Code } from "@/components/Code"
 
-<img align="right" src="/img/providers/resend.svg" height="64" width="96" />
+<img align="right" src="/img/providers/resend.svg" className="dark:bg-[currentColor]" height="64" width="96" />
 
 # Resend Provider