Incorporate breaking utils changes

Brings in:
- [ ] https://github.com/alphagov/notifications-utils/pull/94

app/templates/views/check.html

@@ -127,7 +127,7 @@
 
   {% endif %}
 
-  {{ template.rendered }}
+  {{ template|string }}
 
   {% if errors %}
     {% if request.args.from_test %}

app/templates/views/jobs/job.html

@@ -12,7 +12,7 @@
       {{ uploaded_file_name }}
     </h1>
 
-    {{ template.rendered }}
+    {{ template|string }}
 
     {{ ajax_block(partials, updates_url, 'status', finished=finished) }}
     {{ ajax_block(partials, updates_url, 'counts', finished=finished) }}

app/templates/views/send-from-api.html

@@ -11,7 +11,7 @@
       API info
   </h1>
 
-  {{ template.rendered }}
+  {{ template|string }}
 
   <div class="bottom-gutter">
     {{ api_key(template.id, name="Template ID", thing='template ID') }}

app/templates/views/send-test.html

@@ -19,7 +19,7 @@
     <h1 class="heading-large">Send yourself a test</h1>
   {% endif %}
 
-  {{ template.rendered }}
+  {{ template|string }}
 
   <form method="post">
     {% call(item, row_number) list_table(

app/templates/views/send.html

@@ -11,7 +11,7 @@
 
   <h1 class="heading-large">Upload recipients</h1>
 
-  {{ template.rendered }}
+  {{ template|string }}
 
   <div class="page-footer bottom-gutter">
     {{file_upload(

app/templates/views/templates/_template.html

@@ -1,5 +1,5 @@
 <div class="column-two-thirds">
-  {{ template.rendered }}
+  {{ template|string }}
 </div>
 <div class="column-one-third">
   {% if template._template.archived %}

app/templates/views/templates/_template_history.html

@@ -3,7 +3,7 @@
 </div>
 
 <div class="column-two-thirds">
-  {{ template.rendered }}
+  {{ template|string }}
 </div>
 
 <div class="column-one-third">