Automator: update common-files@master in istio/api@master (#2867)

Author: istio-testing

common/.commonfiles.sha

@@ -1 +1 @@
-fb9f6b89b37e2b141640d92765b70ee316394bed
+647ae898a85f67657165d1cd37ccb325cb6c775f

common/config/.golangci.yml

@@ -55,7 +55,7 @@ linters:
   fast: false
 linters-settings:
   errcheck:
-    # report about not checking of errors in type assetions: `a := b.(MyStruct)`;
+    # report about not checking of errors in type assertions: `a := b.(MyStruct)`;
     # default is false: such cases aren't reported by default.
     check-type-assertions: false
     # report about assignment of errors to blank identifier: `num, _ := strconv.Atoi(numStr)`;