io/fs: don't use absolute path in DirEntry.Name doc
io/fs: don't use absolute path in DirEntry.Name doc

Fixes #47485

Change-Id: I64ac00905a403b7594c706141679051a93058a31
Reviewed-on: https://go-review.googlesource.com/c/go/+/338889
Trust: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>
Run-TryBot: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>
TryBot-Result: Go Bot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Dmitri Shuralyov <d181b7fea0ec87c86ba5a890ab716db52498e3ba@golang.org>

nawawi/go,golang/go,CAFxX/go,golang/go,nawawi/go,CAFxX/go,golang/go,CAFxX/go,CAFxX/go,nawawi/go,nawawi/go,golang/go,nawawi/go,CAFxX/go,cloudflare/go,nawawi/go,golang/go,cloudflare/go,cloudflare/go,cloudflare/go,CAFxX/go,cloudflare/go,nawawi/go,cloudflare/go,CAFxX/go,cloudflare/go,golang/go,CAFxX/go,nawawi/go,golang/go,golang/go,cloudflare/go