Updating tox.ini

Change-Id: I87574da5911b4c827cf2543ecc9e9f404da96f85
Signed-off-by: sousaedu <eduardo.sousa@canonical.com>
diff --git a/NG-RO/osm_ng_ro/html_out.py b/NG-RO/osm_ng_ro/html_out.py
index 132bf68..1b01cb8 100644
--- a/NG-RO/osm_ng_ro/html_out.py
+++ b/NG-RO/osm_ng_ro/html_out.py
@@ -15,9 +15,10 @@
 Contains html text in variables to make and html response
 """
 
-import yaml
-from http import HTTPStatus
 from html import escape as html_escape
+from http import HTTPStatus
+
+import yaml
 
 __author__ = "Alfonso Tierno <alfonso.tiernosepulveda@telefonica.com>"