Update README.md

Co-authored-by: Bartosz Błaszków <bartosz.blaszkow@swmansion.com>

README.md

@@ -23,7 +23,7 @@ This package provides core of the [Membrane Multimedia Framework](https://membra
 Add the following line to your `deps` in `mix.exs`. Run `mix deps.get`.
 
 ```elixir
-	{:membrane_core, "~> 0.10.0"}
+{:membrane_core, "~> 0.10.0"}
 ```
 
 ## Getting started