Update Elixir version to 0.17

Author: bchassoul

README.md

@@ -46,7 +46,7 @@ def project do
   [
     app: :my_grisp_app,
     version: "0.1.0",
-    elixir: "~> 1.14",
+    elixir: "~> 1.17",
     start_permanent: Mix.env() == :prod,
     deps: deps(),
     grisp: grisp(),