Discussion links don't use custom slugger

[clarkwinkelmann]

Bug Report

Current Behavior
All discussion links in mail templates are hard-coded to use discussion ID

subscribed/resources/views/emails/discussionCreated.blade.php

Line 5 in 029999e

'{discussion_url}' => $url->to('forum')->route('discussion', ['id' => $blueprint->discussion->id]),

subscribed/resources/views/emails/postCreated.blade.php

Line 5 in 029999e

'{post_url}' => $url->to('forum')->route('discussion', ['id' => $blueprint->post->discussion_id, 'near' => $blueprint->post->number]),

subscribed/resources/views/emails/postFlagged.blade.php

Line 5 in 029999e

'{post_url}' => $url->to('forum')->route('discussion', ['id' => $blueprint->post->discussion_id, 'near' => $blueprint->post->number]),

subscribed/resources/views/emails/postUnapproved.blade.php

Line 5 in 029999e

'{post_url}' => $url->to('forum')->route('discussion', ['id' => $blueprint->post->discussion_id, 'near' => $blueprint->post->number]),

Expected Behavior
Should use slugger.

Environment

• Extension version: observed on master branch during visual code review