fix selected week on weekly stats page

closes #6079

Changelog.md

@@ -56,6 +56,7 @@
 * Disable autocorrect for username on mobile sign in [#6028](https://github.com/diaspora/diaspora/pull/6028)
 * Fix broken default avatars in the database [#6014](https://github.com/diaspora/diaspora/pull/6014)
 * Only strip text direction codepoints around hashtags [#6067](https://github.com/diaspora/diaspora/issues/6067)
+* Fix selected week on admin weekly stats page [#6079](https://github.com/diaspora/diaspora/pull/6079)
 
 ## Features
 * Hide post title of limited post in comment notification email [#5843](https://github.com/diaspora/diaspora/pull/5843)

app/views/admins/weekly_user_stats.haml

@@ -7,7 +7,7 @@
 
   %div.pull-right
     = form_tag('/admins/weekly_user_stats', method: 'get', class: 'form-inline') do
-      = select_tag(:week, options_for_select(@created_users_by_week.keys.reverse), selected: @selected_week)
+      = select_tag(:week, options_for_select(@created_users_by_week.keys.reverse, @selected_week))
       = submit_tag t('admins.stats.go'), class: 'btn btn-primary'
 
   = t('.amount_of', count: @counter)