Update cheatsheets

elixir

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# elixir
+
+> Elixir programming language interpreter.
+> More information: <https://elixir-lang.org>.
+
+- Run an Elixir file:
+
+`elixir {{path/to/file}}`
+
+- Evaluate Elixir code by passing it as an argument:
+
+`elixir -e "{{code}}"`