kas: support .yaml extension

.yaml is the recommended extension (https://yaml.org/faq.html)

Signed-off-by: Chris Laplante <mostthingsweb@gmail.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

kas/includehandler.py

@@ -58,7 +58,7 @@ def load_config(filename):
         import json
         with open(filename, 'rb') as fds:
             config = json.load(fds)
-    elif ext == '.yml':
+    elif ext in ['.yml', '.yaml']:
         import yaml
         with open(filename, 'rb') as fds:
             config = yaml.safe_load(fds)