Fix warning reported by LuaCheck (#563)

David Leal

2020-09-05 11f2b4f4b317a25972733e3d3fe9f2dc6ce31c6a

 README.md

@@ -1,6 +1,9 @@
Technic
=======

[![Build status](https://github.com/minetest-mods/technic/workflows/Check%20&%20Release/badge.svg)](https://github.com/minetest-mods/technic/actions)
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Credits for contributing to the project (in alphabetical order):
  * kpoppel
  * Nekogloop