UI: Fix file view responsiveness on mobile

The contents of the file would extend beyond the border of the card so
the entire page would scroll horizontally.

Add the table-responsive class to keep the table within the boundary of
the UI.

ara/ui/templatetags/pygments_highlights.py

@@ -15,7 +15,7 @@
 @register.filter(name="format_yaml")
 def format_yaml(code):
     formatter = HtmlFormatter(
-        linenos="table", anchorlinenos=True, lineanchors="line", linespans="line", cssclass="codehilite"
+        linenos="table", anchorlinenos=True, lineanchors="line", linespans="line", cssclass="table-responsive codehilite"
     )
 
     if not code: