[fix] settings - displayed name is SearXNG

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/settings.yml

@@ -1,6 +1,6 @@
 general:
   debug: false              # Debug mode, only for development
-  instance_name: "searxng"  # displayed name
+  instance_name: "SearXNG"  # displayed name
   contact_url: false        # mailto:contact@example.com
 
 brand:

tests/unit/test_webapp.py

@@ -99,7 +99,7 @@ class ViewsTestCase(SearxTestCase):
     def test_search_empty_html(self):
         result = self.app.post('/search', data={'q': ''})
         self.assertEqual(result.status_code, 200)
-        self.assertIn(b'<span class="instance pull-left"><a href="/">searxng</a></span>', result.data)
+        self.assertIn(b'<span class="instance pull-left"><a href="/">SearXNG</a></span>', result.data)
 
     def test_search_empty_json(self):
         result = self.app.post('/search', data={'q': '', 'format': 'json'})