Fix REST API version reporting for beta releases

netbox/netbox/settings.py

@@ -459,7 +459,7 @@ FILTERS_NULL_CHOICE_VALUE = 'null'
 # Django REST framework (API)
 #
 
-REST_FRAMEWORK_VERSION = VERSION.rsplit('.', 1)[0]  # Use major.minor as API version
+REST_FRAMEWORK_VERSION = '.'.join(VERSION.split('-')[0].split('.')[:2])  # Use major.minor as API version
 REST_FRAMEWORK = {
     'ALLOWED_VERSIONS': [REST_FRAMEWORK_VERSION],
     'COERCE_DECIMAL_TO_STRING': False,