Update cheatsheets

lua

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# lua
+
+> A powerful, light-weight embeddable programming language.
+> More information: <https://www.lua.org>.
+
+- Start an interactive Lua shell:
+
+`lua`
+
+- Execute a Lua script:
+
+`lua {{path/to/script.lua}} {{--optional-argument}}`
+
+- Execute a Lua expression:
+
+`lua -e '{{print("Hello World")}}'`