Fix libraryUrl

[alexgleason]

Did this ever work? Seems like a typo unless the npm package name changed.

Fixes the following error:

> import { open } from '../Projects/lmdbx-js/mod.ts';
Download https://cdn.jsdelivr.net/npm/lmdbs@latest/prebuilds/linux-x64/node.abi93.glibc.node
Uncaught Error: Unable to fetch https://cdn.jsdelivr.net/npm/lmdbs@latest/prebuilds/linux-x64/node.abi93.glibc.node, HTTP response: 404
    at file:///home/alex/Projects/lmdbx-js/mod.ts:24:19