feat: remove test 6.2.6 from list of excluded tests

Author: christopher-exx

tests/csaf_2_1/oasis.js

@@ -35,7 +35,6 @@ const excluded = [
   '6.1.47',
   '6.1.48',
   '6.1.49',
-  '6.2.6',
   '6.2.11',
   '6.2.19',
   '6.2.21',