Fix a Postgres error when Google profile pic URLs are super long (#2367)

Fixes a long-standing issue with some Google auth logins. Silly Josh.

Author: joshk

priv/repo/migrations/20250927020640_change_users_profile_picture_url_type.exs

@@ -0,0 +1,9 @@
+defmodule NervesHub.Repo.Migrations.ChangeUsersProfilePictureUrlType do
+  use Ecto.Migration
+
+  def change() do
+    alter table("users") do
+      modify(:profile_picture_url, :text, from: :string)
+    end
+  end
+end