Automator: update common-files@master in istio/api@master (#3401)

Author: istio-testing

common/.commonfiles.sha

@@ -1 +1 @@
-3f8dd6bda6fdafdb00f96e6a3b52a371d73cc9c4
+af9ad65a72341ca5c10fa71042ffee5cac3b190c

common/config/license-lint.yml

@@ -125,4 +125,10 @@ allowlisted_modules:
 
 # Simplified BSD (BSD-2-Clause): https://github.com/russross/blackfriday/blob/master/LICENSE.txt
 - github.com/russross/blackfriday
-- github.com/russross/blackfriday/v2
+- github.com/russross/blackfriday/v2
+
+# W3C Test Suite License, W3C 3-clause BSD License
+# gonum uses this for its some of its test files
+# gonum.org/v1/gonum/graph/formats/rdf/testdata/LICENSE.md
+- gonum.org/v1/gonum
+