Tag current maintainer of AUR package (#1761)

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# Summary

Add the maintainer info of the ArchiveBox AUR package for
accountability. Much of the packaging has changed since the time of its
initial contribution and I as the current maintainer will make sure
these changes will work smoothly moving forward. I will also make sure
this AUR package will be up to date once the 0.9.x branch is released.

# Related issues

<!-- e.g. #123 or Roadmap goal #
https://github.com/pirate/ArchiveBox/wiki/Roadmap -->

# Changes these areas

- [ ] Bugfixes
- [ ] Feature behavior
- [ ] Command line interface
- [ ] Configuration options
- [ ] Internal architecture
- [ ] Snapshot data layout on disk


<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Update README to tag the current maintainer of the Arch AUR package.
Adds “maintained by @jasongodev” next to the original contributor to
improve accountability and clarify support.

<sup>Written for commit 0d05fd8c53e083bf3a356df47c13b3c21257d89f.
Summary will update on new commits.</sup>

<!-- End of auto-generated description by cubic. -->

README.md

@@ -370,7 +370,7 @@ See <a href="#%EF%B8%8F-cli-usage">below</a> for more usage examples using the C
 > *Warning: These are contributed by external volunteers and may lag behind the official `pip` channel.*
 
 <ul>
-<li>Arch: <a href="https://aur.archlinux.org/packages/archivebox/"><code>yay -S archivebox</code></a> (contributed by <a href="https://github.com/imlonghao"><code>@imlonghao</code></a>)</li>
+<li>Arch: <a href="https://aur.archlinux.org/packages/archivebox/"><code>yay -S archivebox</code></a> (contributed by <a href="https://github.com/imlonghao"><code>@imlonghao</code></a>, maintained by <a href="https://github.com/jasongodev"><code>@jasongodev</code></a>)</li>
 <li>FreeBSD: <a href="https://github.com/ArchiveBox/ArchiveBox#%EF%B8%8F-easy-setup"><code>curl -fsSL 'https://get.archivebox.io' | bash</code></a> (uses <code>pkg</code> + <code>pip3</code> under-the-hood)</li>
 <li>Nix: <a href="https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/misc/archivebox/default.nix"><code>nix-env --install archivebox</code></a> (contributed by <a href="https://github.com/siraben"><code>@siraben</code></a>)</li>
 <li>Guix: <a href="https://packages.guix.gnu.org/packages/archivebox/"><code>guix install archivebox</code></a> (contributed by <a href="https://github.com/rakino"><code>@rakino</code></a>)</li>