[INLONG-1625] fix the Contribution Guide errors

[dockerzhang]

Fixes #apache/inlong#1625

Motivation

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Modifications

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Verifying this change

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(Please pick either of the following options)

This change is a trivial rework / code cleanup without any test coverage.

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This change is already covered by existing tests, such as (please describe tests).

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This change added tests and can be verified as follows:

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• Added integration tests for end-to-end deployment with large payloads (10MB)
• Extended integration test for recovery after broker failure

Documentation

• Does this pull request introduce a new feature? (yes / no)
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• If a feature is not documented yet in this PR, please create a followup issue for adding the documentation

[gosonzhang]

+1