Make Firefox dev build auto-update

Author: gorhill

dist/firefox/updates.json

@@ -3,9 +3,9 @@
  "uBlock0@raymondhill.net": {
  "updates": [
  {
- "version": "1.51.1.22",
+ "version": "1.51.1.23",
  "browser_specific_settings": { "gecko": { "strict_min_version": "79.0" } },
- "update_link": "https://github.com/gorhill/uBlock/releases/download/1.51.1b22/uBlock0_1.51.1b22.firefox.signed.xpi"
+ "update_link": "https://github.com/gorhill/uBlock/releases/download/1.51.1b23/uBlock0_1.51.1b23.firefox.signed.xpi"
  }
  ]
  }