Update dependency phoenix_html to v3

mix.exs

@@ -40,7 +40,7 @@ defmodule Move.MixProject do
   defp deps do
     [
       {:phoenix, "~> 1.5.6"},
-      {:phoenix_html, "~> 2.11"},
+      {:phoenix_html, "~> 3.0"},
       {:phoenix_live_reload, "~> 1.2", only: :dev},
       {:phoenix_live_dashboard, "~> 0.4.0"},
       {:telemetry_metrics, "~> 0.6"},