ticdc: update java example link

[Liuxiaozhen12]

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What is the related PR or file link(s)?

• This PR is translated from: ticdc: update java example link docs-cn#7597
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• Delete files
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[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• TomShawn

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[Rustin170506]

lgtm

[ti-chi-bot]

@hi-rustin: Thanks for your review. The bot only counts approvals from reviewers and higher roles in list, but you're still welcome to leave your comments.

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[Liuxiaozhen12]

/remove-status LGT1
/status LGT2

[Liuxiaozhen12]

/merge

[ti-chi-bot]

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

Commit hash: f8ce431