Update language on "Submit Documentation Comment" page.

The language is more thorough in describing how to use the form,
in an effort to help improve the overall quality of submissions to
pgsql-docs.

pgweb/docs/views.py

@@ -157,10 +157,10 @@ def commentform(request, itemid, version, filename):
 
 	return render_pgweb(request, 'docs', 'base/form.html', {
 		'form': form,
-		'formitemtype': 'documentation correction',
+		'formitemtype': 'documentation comment',
 		'operation': 'Submit',
 		'form_intro': template_to_string('docs/docsbug.html', {
 			'user': request.user,
 		}),
-		'savebutton': 'Send email',
+		'savebutton': 'Send Email',
 	})