docs: add missing doc

.golangci.next.reference.yml

@@ -2878,7 +2878,7 @@ issues:
  # This line must appear before the first non-comment, non-blank text in the file.
  # https://go.dev/s/generatedcode
  # - `lax`: sources are excluded if they contain lines `autogenerated file`, `code generated`, `do not edit`, etc.
- # - `disable`: xxx
+ # - `disable`: disable the generated files exclusion.
  #
  # Default: lax
  exclude-generated: strict