index: point the NextBSD search links at the nextbsd org

The org was renamed nextbsd-redux -> nextbsd, and GitHub search does not
follow the org redirect the way repository URLs do:

    org:nextbsd-redux author:pkgdemon
      -> 422 Validation Failed, "the listed users and repositories cannot be
         searched either because the resources do not exist or you do not have
         permission to view them"

So both links were returning nothing. With the new org name they resolve to
2041 commits and 562 pull requests.

Author: pkgdemon

index.html

@@ -78,8 +78,8 @@ <h2>Research</h2>
 <h2>Volunteer Projects</h2>
 <ul class="guides">
   <li><a href="https://nextbsd.org">NextBSD</a> 2026&ndash;present &mdash;
-    <a href="https://github.com/search?q=org%3Anextbsd-redux+author%3Apkgdemon&type=commits&s=author-date&o=asc">Commits</a>,
-    <a href="https://github.com/search?q=org%3Anextbsd-redux+author%3Apkgdemon&type=pullrequests&s=updated&o=asc">Pull Requests</a>
+    <a href="https://github.com/search?q=org%3Anextbsd+author%3Apkgdemon&type=commits&s=author-date&o=asc">Commits</a>,
+    <a href="https://github.com/search?q=org%3Anextbsd+author%3Apkgdemon&type=pullrequests&s=updated&o=asc">Pull Requests</a>
     <span class="desc">Reviving NextBSD &mdash; macOS system technologies (launchd, Mach IPC, libdispatch) on a modern FreeBSD base, with a CI-built kernel, modules, and live ISO.</span>
   </li>
   <li><a href="https://hexbsd.org">HexBSD</a> 2025&ndash;present &mdash;