Update sponsors link

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

Author: alexellis

_includes/support-page/support-cards.html

@@ -13,7 +13,7 @@ <h1 class="title is-size-4 is-size-3-desktop has-text-grey-darker">
                                     Buy an OpenFaaS Insiders Subscription
                                 </h1>
                                 <h1 class="title has-text-weight-light is-size-5 is-size-4-desktop has-text-grey">
-                                    Subscribe to the OpenFaaS Insiders program through <a href="https://github.com/sponsors">GitHub Sponsors</a>
+                                    Subscribe to the OpenFaaS Insiders program through <a href="https://github.com/users/alexellis/sponsorship">GitHub Sponsors</a>
 
                                     All subscribers gain exclusive access to regular update emails with the latest news, tutorials, industry news about OpenFaaS, Serverless, Kubernetes, and Docker.
                                 </h1>