Unescape search response before rendering template

Fixes a small issue with the previous commit where bolded search terms
had the <b> tags escaped, rather than being applied as actual html.

app/routes.py

@@ -1,5 +1,6 @@
 import argparse
 import base64
+import html
 import io
 import json
 import pickle
@@ -273,7 +274,7 @@ def search():
         is_translation=any(
             _ in query.lower() for _ in [translation['translate'], 'translate']
         ) and not search_util.search_type,  # Standard search queries only
-        response=response,
+        response=html.unescape(str(response)),
         version_number=app.config['VERSION_NUMBER'],
         search_header=(render_template(
             'header.html',