Feature: Clarify that docs issues typically don't get version labels

Describe the enhancement or feature you would like

In learning how to label / triage came across a docs issue where I got the labels fairly off and I would like to add more details to the devguide to help future triagers get it right the first time. In particular:

1. docs issues don't typically get version labels (Those tend to only go with code changes)
2. If there's no code change needed then stdlib, extension-modules, etc. tend not to apply.

Describe alternatives you have considered

No response

Additional context

No response

此 issue 未指出 devguide 中的檔案或章節；請先找出關於標籤與 triage 的文件。新增指引，說明 docs issue 通常不會加上版本標籤或程式碼區域標籤，例如 stdlib 和 extension-modules，然後確認措辭符合周圍的指引。