Consider redirecting to github.com/PowerDNS/lmdb-go fork

[wojas]

Please consider recommending our github.com/PowerDNS/lmdb-go fork to people visiting this page.

From our README:

---

This fork was created after the upstream repository bmatsuo/lmdb-go
went without updates for 4 years. We would like to express our thanks to
bmatsuo for creating and maintaining this repository until 2017.

We decided to rename this repository to allow usage without replace
directives in the go.mod, as we do not expect this to be a temporary
fork. This also makes it clear that new versions released here are
different from any upstream versions.

To use this package, update all your import paths from
github.com/bmatsuo/lmdb-go to github.com/PowerDNS/lmdb-go.

This affects all versions starting from 1.9.0.

Note that the experimental, never released exp/lmdbpool package has
been removed in this fork.

---

If you are willing to recommend our fork, we can provide a PR to update the README.

Thank you for the fantastic work you have done on these bindings over the years.