dumpling: update table-filter doc

[lichunzhu]

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What is changed, added or deleted? (Required)

close pingcap/dumpling#268
Update dumpling's description about behaviors about table-filter.

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• master (the latest development version)
• v5.0 (TiDB 5.0 versions)
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[TomShawn]

/cc @cyliu0

[TomShawn]

/label needs-cherry-pick-5.0
/label needs-cherry-pick-4.0
/status PTAL
/translation doing
/assign @Liuxiaozhen12

[ti-chi-bot]

@TomShawn: GitHub didn't allow me to assign the following users: Liuxiaozhen12.

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In response to this:

/label needs-cherry-pick-5.0
/label needs-cherry-pick-4.0
/status PTAL
/translation doing
/assign @Liuxiaozhen12

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[TomShawn]

/assign Joyinqin

[Liuxiaozhen12]

/translation done

[Liuxiaozhen12]

/remove-translation doing

[Liuxiaozhen12]

/unassign Joyinqin
/assign

[glorv]

LGTM

[TomShawn]

/label require-LGT1
/lgtm

[ti-chi-bot]

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[TomShawn]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: e0b67b3

[ti-srebot]

cherry pick to release-4.0 in PR #6145

[ti-srebot]

cherry pick to release-5.0 in PR #6146