Remove text-center class in heading price header

Not sure why it was added in commit 9fb5019f0, but it made the table
look funny on some screens, particularly after adding the extra field
we're about to add.

app/components/admin/budget_headings/headings_component.html.erb

@@ -5,7 +5,7 @@
       <tr>
         <th><%= Budget::Heading.human_attribute_name(:name) %></th>
         <% if budget.show_money? %>
-          <th class="text-center"><%= Budget::Heading.human_attribute_name(:price) %></th>
+          <th><%= Budget::Heading.human_attribute_name(:price) %></th>
         <% end %>
         <% if budget.approval_voting? %>
           <th><%= Budget::Heading.human_attribute_name(:max_ballot_lines) %></th>