Update Vapor Logo (#1089)

* Update the Vapor logo

* Better logo sizing

Author: 0xTim

_data/new-data/get-started/cloud-services/secondary-content.yml

@@ -1,7 +1,7 @@
 title: Leverage web frameworks
 secondary_cards:
   - name: Vapor
-    logo: /assets/images/getting-started/cloud-services/secondary-card-vapor-logo.png
+    logo: /assets/images/getting-started/cloud-services/vapor-logo-dark-background.png
     logo_alt: Vapor logo
     text: Vapor provides a safe, performant and easy to use foundation to build HTTP servers, backends and APIs in Swift.
     link_text: Vapor