chore(deps): update dependency phoenix to ~> 1.8.0 (#167)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [phoenix](https://hex.pm/packages/phoenix) ([source](https://github.com/phoenixframework/phoenix)) | prod | minor | `~> 1.7.0` -> `~> 1.8.0` |

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This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
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Co-authored-by: Joao P Dubas <joao.dubas+gitea@gmail.com>
Reviewed-on: #167
Co-authored-by: renovate-bot <renovate-bot@dubas.dev>
Co-committed-by: renovate-bot <renovate-bot@dubas.dev>

mix.exs

@@ -44,7 +44,7 @@ defmodule Wabanex.MixProject do
       {:lcov_ex, "~> 0.3.0", only: [:dev, :test], runtime: false},
       {:mix_audit, "~> 2.1.0", only: [:dev, :test], runtime: false},
       {:pg_ranges, "~> 1.1.0"},
-      {:phoenix, "~> 1.7.0"},
+      {:phoenix, "~> 1.8.0"},
       {:phoenix_ecto, "~> 4.6.0"},
       {:phoenix_view, "~> 2.0.0"},
       {:phoenix_live_dashboard, "~> 0.8.0"},