Fix typos after i18n yml

app/views/admin/app_auths/index.html.erb

@@ -16,7 +16,7 @@
 		      <td><%= t(:author) %></td>
 		      <td><%= t(:organization) %></td>
 		      <td><%= t(:version) %></td>
-					<td class="action"><%= t(':action') %></td>
+					<td class="action"><%= t(:action) %></td>
 			</tr>
 		</thead>
 		<tbody>

app/views/admin/attributes/index.html.erb

@@ -10,7 +10,7 @@
 		<thead>
 		<tr>
 			<td class="<%= @attribute_type %>s"><%= t("admin.#{@attribute_type}") %></td>
-			<td class="action"><%= t(':action') %></td>
+			<td class="action"><%= t(:action) %></td>
 		</tr>
 		</thead>
 		<tbody>

app/views/admin/purchases/index.html.erb

@@ -6,7 +6,7 @@
 				<td><%= t(:title) %></td>
 				<td><%= t(:intro) %></td>
 				<td><%= t(:author) %></td>
-				<td><%= t(':action') %></td>
+				<td><%= t(:action) %></td>
 			</tr>
 		</thead>
 		<%# @purchases.each do |purchase| %>

app/views/admin/users/index.html.erb

@@ -14,7 +14,7 @@
 				<td class="name"><%= t(:name) %></td>
 				<td class="email"><%= t(:email) %></td>
 				<td class="admin"><%= t(:admin) %></td>
-				<td class="action"><%= t(':action') %></td>
+				<td class="action"><%= t(:action) %></td>
 			</tr>
 		</thead>
 		<tbody>