nav: drop GitHub link

Keeps the editorial focus on the manual itself; GitHub is still
linked from the footer and About for anyone who wants the source.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: khaliqgant

components/site-footer.tsx

@@ -30,7 +30,7 @@ export function SiteFooter() {
               About
             </Link>
             <p className="mt-3 text-xs text-ink-faint">
-              Made by AgentWorkforce. Set in Fraunces &amp; Instrument Serif.
+              Crafted by AgentWorkforce.
             </p>
           </div>
         </div>

components/site-nav.tsx

@@ -21,12 +21,6 @@ export function SiteNav() {
           <Link href="/about" className="hover:text-terracotta transition-colors">
             About
           </Link>
-          <a
-            href="https://github.com/AgentWorkforce"
-            className="hover:text-terracotta transition-colors"
-          >
-            GitHub
-          </a>
         </nav>
       </div>
     </header>