Fix linters.default value for golangci-lint v2

Change linters.default from 'false' to 'none' as required by v2 schema.
The default field must be one of: 'standard', 'all', 'none', 'fast'.

Author: vnykmshr

.golangci.yml

@@ -4,7 +4,7 @@ run:
   timeout: 5m
 
 linters:
-  default: false
+  default: none
   enable:
     - errcheck
     - gosimple