[doc] Update the doc BOT configuration

[fengtao1998]

Update the doc BOT configuration about github token

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[fengtao1998]

@eolivelli PTAL

[lhotari]

I don't think will work.

"A GitHub token created for a PR coming from a fork doesn't have
'admin' or 'write' permission (which is required to add labels)"

added as a comment to:

pulsar/.github/workflows/ci-documentbot.yml

Lines 12 to 13 in 85f0770

	# A GitHub token created for a PR coming from a fork doesn't have
	# 'admin' or 'write' permission (which is required to add labels)

[eolivelli]

I agree with Lari

I am pushing a revert

[eolivelli]

#12134

[fengtao1998]

For this document robot, an account with repo management permission is required. In order to save steps, I consider using reference to the existing token to reduce the trouble of creating a new account. But it seems that this is not feasible. Can I get the token of a new account with label permission? Thank you for your reply
@lhotari @eolivelli