Update phoenix_html requirement from ~> 2.10 or ~> 3.0 to ~> 2.10 or …

…~> 3.0 or ~> 4.0

Updates the requirements on [phoenix_html](https://github.com/phoenixframework/phoenix_html) to permit the latest version.
- [Changelog](https://github.com/phoenixframework/phoenix_html/blob/main/CHANGELOG.md)
- [Commits](https://github.com/phoenixframework/phoenix_html/commits/v4.0.0)

---
updated-dependencies:
- dependency-name: phoenix_html
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

mix.exs

@@ -25,7 +25,7 @@ defmodule PhoenixMetaTags.MixProject do
 
   defp deps do
     [
-      {:phoenix_html, "~> 2.10 or ~> 3.0"},
+      {:phoenix_html, "~> 2.10 or ~> 3.0 or ~> 4.0"},
       {:plug, "~> 1.7"},
       {:ex_doc, ">= 0.0.0", only: :dev, runtime: false}
     ]