Broken link for "Extension naming convensions"

Created by: seancolsen

1. https://docs.civicrm.org/dev/en/master/extensions/civix/
2. "Generating a skeletal extension" section
3. "See here for details of naming conventions."
4. "here" link is broken

Created by: ErichBSchulz

that sould go to https://docs.civicrm.org/dev/en/master/extensions/basics/#extension-names