Clean up accounts open graph partial

Two separate changes:

- Moves an opengraph tag which was not in the og partial into the partial
- Moves a non-opengraph tag (meta desc) which was in the partial out of the partial

app/views/accounts/_og.html.haml

@@ -1,11 +1,8 @@
-- description = account_description(account)
-
-%meta{ name: 'description', content: description }/
-
+= opengraph 'og:type', 'profile'
 = opengraph 'og:url', url
 = opengraph 'og:site_name', site_title
 = opengraph 'og:title', yield(:page_title).strip
-= opengraph 'og:description', description
+= opengraph 'og:description', account_description(account)
 = opengraph 'og:image', full_asset_url(account.avatar.url(:original))
 = opengraph 'og:image:width', '400'
 = opengraph 'og:image:height', '400'

app/views/accounts/show.html.haml

@@ -11,7 +11,7 @@
   - @account.fields.select(&:verifiable?).each do |field|
     %link{ rel: 'me', type: 'text/html', href: field.value }/
 
-  = opengraph 'og:type', 'profile'
+  %meta{ name: 'description', content: account_description(@account) }/
   = render 'og', account: @account, url: short_account_url(@account, only_path: false)
 
 = render partial: 'shared/web_app'