conf 2026: Update Sponsor link buttons (#2312)

Co-authored-by: Benjie <benjie@jemjie.com>

Author: jemgillam

src/app/conf/2026/components/become-a-sponsor/index.tsx

@@ -18,17 +18,15 @@ export function BecomeASponsor() {
               to industry leaders and decision-makers.
             </p>
           </div>
-          {/* TODO
           <Button
             variant="primary"
-            href="http://events.linuxfoundation.org/sponsor-graphqlconf26"
+            href="https://events.linuxfoundation.org/sponsor-graphqlconf26"
             target="_blank"
             rel="noreferrer"
             className="md:w-fit"
           >
             Sponsor
           </Button>
-          */}
         </header>
         <dl className="relative z-10 mt-10 border border-neu-300 md:backdrop-blur-[6.4px] xl:mt-16">
           <DefinitionListItem

src/app/conf/2026/components/register-section/index.tsx

@@ -62,15 +62,13 @@ export function RegisterSection({ className, ...props }: RegisterSectionProps) {
               graphql_events@linuxfoundation.org
             </a>
           </p>
-          {/* TODO
           <Button
             variant="primary"
             className="mt-6"
-            href="https://events.linuxfoundation.org/wp-content/uploads/2025/02/sponsor_GraphQLConf_2025_022025.pdf"
+            href="https://events.linuxfoundation.org/sponsor-graphqlconf26"
           >
             Become a sponsor
           </Button>
-          */}
         </article>
         <article className="border border-neu-400 p-6">
           <h3 className="typography-h3">Media</h3>