Update the description about processBeforeResponse in Reference document

[seratch]

Summary

The processBeforeResponse option is not only for Events API. Also, it's not about the automatic acknowledgement.

Requirements (place an x in each [ ])

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.

[codecov]

Codecov Report

Merging #836 (fecab0d) into main (1968af4) will not change coverage.
The diff coverage is n/a.

❗ Current head fecab0d differs from pull request most recent head 42b186e. Consider uploading reports for the commit 42b186e to get more accurate results

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##             main     #836   +/-   ##
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  Coverage   65.89%   65.89%           
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  Files          13       13           
  Lines        1173     1173           
  Branches      343      343           
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  Hits          773      773           
  Misses        334      334           
  Partials       66       66           

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