[SEO] Correct footer links (#18136)

* correct Support link omg

* customer stories link correction

* one more!

Co-authored-by: Sarah Schneider <sarahs@github.com>

Author: skullface

includes/footer.html

@@ -12,7 +12,7 @@ <h4 class="mb-3 text-mono text-gray-light text-normal">{% data ui.footer.product
           <li class="lh-condensed mb-3"><a href="https://github.com/features" class="link-gray">{% data ui.footer.product.links.features %}</a></li>
           <li class="lh-condensed mb-3"><a href="https://github.com/security" class="link-gray">{% data ui.footer.product.links.security %}</a></li>
           <li class="lh-condensed mb-3"><a href="https://github.com/enterprise" class="link-gray">{% data ui.footer.product.links.enterprise %}</a></li>
-          <li class="lh-condensed mb-3"><a href="https://github.com/case-studies?type=customers" class="link-gray">{% data ui.footer.product.links.case_studies %}</a></li>
+          <li class="lh-condensed mb-3"><a href="https://github.com/customer-stories?type=enterprise" class="link-gray">{% data ui.footer.product.links.case_studies %}</a></li>
           <li class="lh-condensed mb-3"><a href="https://github.com/pricing" class="link-gray">{% data ui.footer.product.links.pricing %}</a></li>
           <li class="lh-condensed mb-3"><a href="https://resources.github.com" class="link-gray">{% data ui.footer.product.links.resources %}</a></li>
         </ul>

includes/small-footer.html

@@ -10,7 +10,7 @@
       <li class="ml-3"><a href="https://github.com/security">{% data ui.footer.product.links.security %}</a></li>
       <li class="ml-3"><a href="https://www.githubstatus.com/">{% data ui.footer.support.links.status %}</a></li>
       <li class="ml-3"><a href="/">{% data ui.footer.support.links.help %}</a></li>
-      <li class="ml-3"><a href="https://support.github.com/contact">{% data ui.footer.support.links.contact_github %}</a></li>
+      <li class="ml-3"><a href="https://support.github.com">{% data ui.footer.support.links.contact_github %}</a></li>
       <li class="ml-3"><a href="https://github.com/pricing">{% data ui.footer.product.links.pricing %}</a></li>
       <li class="ml-3"><a href="/developers">{% data ui.footer.platform.links.developer_api %}</a></li>
       <li class="ml-3"><a href="https://services.github.com/">{% data ui.footer.support.links.training %}</a></li>