Add an ARIA label to site customization images fields

This way it'll be easier for people using screen readers to know which
field they're on.

app/components/admin/site_customization/images/table_actions_component.html.erb

@@ -2,7 +2,7 @@
   <%= form_for([:admin, image], html: { id: "edit_#{dom_id(image)}" }) do |f| %>
     <div>
       <%= image_tag image.image if image.persisted_attachment? %>
-      <%= f.file_field :image, label: false %>
+      <%= f.file_field :image, label: false, "aria-label": image.name %>
     </div>
 
     <%= f.submit(t("admin.site_customization.images.index.update"), class: "button hollow") %>

spec/system/admin/site_customization/images_spec.rb

@@ -10,7 +10,7 @@ describe "Admin custom images", :admin do
     end
 
     within("tr#image_logo_header") do
-      attach_file "site_customization_image_image", file_fixture("logo_header.png")
+      attach_file "logo_header", file_fixture("logo_header.png")
       click_button "Update"
     end
 
@@ -22,7 +22,7 @@ describe "Admin custom images", :admin do
     visit admin_site_customization_images_path
 
     within("tr#image_map") do
-      attach_file "site_customization_image_image", file_fixture("custom_map.jpg")
+      attach_file "map", file_fixture("custom_map.jpg")
       click_button "Update"
     end
 
@@ -38,7 +38,7 @@ describe "Admin custom images", :admin do
     visit admin_site_customization_images_path
 
     within("tr#image_map") do
-      attach_file "site_customization_image_image", file_fixture("custom_map.jpg")
+      attach_file "map", file_fixture("custom_map.jpg")
       click_button "Update"
     end
 
@@ -78,7 +78,7 @@ describe "Admin custom images", :admin do
     visit admin_site_customization_images_path
 
     within("tr#image_logo_email") do
-      attach_file "site_customization_image_image", file_fixture("logo_email_custom.png")
+      attach_file "logo_email", file_fixture("logo_email_custom.png")
       click_button "Update"
     end
 
@@ -93,7 +93,7 @@ describe "Admin custom images", :admin do
     visit admin_site_customization_images_path
 
     within("tr#image_social_media_icon") do
-      attach_file "site_customization_image_image", file_fixture("logo_header.png")
+      attach_file "social_media_icon", file_fixture("logo_header.png")
       click_button "Update"
     end
 
@@ -105,7 +105,7 @@ describe "Admin custom images", :admin do
     visit admin_site_customization_images_path
 
     within("tr#image_social_media_icon") do
-      attach_file "site_customization_image_image", file_fixture("social_media_icon.png")
+      attach_file "social_media_icon", file_fixture("social_media_icon.png")
       click_button "Update"
     end