fix chunkoutputstream chunksize exception

[suncairong163]

What is the purpose of the change

#12891
fix chunkoutputstream chunksize exception

Brief changelog

Verifying this change

@CrazyHZM

Checklist

• Make sure there is a GitHub_issue field for the change (usually before you start working on it). Trivial changes like typos do not require a GitHub issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue.
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• Check if is necessary to patch to Dubbo 3 if you are work on Dubbo 2.7
• Write necessary unit-test to verify your logic correction, more mock a little better when cross module dependency exist. If the new feature or significant change is committed, please remember to add sample in dubbo samples project.
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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

82.4% Coverage
0.0% Duplication

[codecov-commenter]

Codecov Report

Merging #12926 (254005f) into 3.2 (6b617a1) will decrease coverage by 0.60%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                3.2   #12926      +/-   ##
============================================
- Coverage     70.06%   69.47%   -0.60%     
+ Complexity      339        2     -337     
============================================
  Files          1875     1648     -227     
  Lines         99207    68407   -30800     
  Branches      18069     9993    -8076     
============================================
- Hits          69507    47524   -21983     
+ Misses        24194    16296    -7898     
+ Partials       5506     4587     -919     

see 3523 files with indirect coverage changes

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[AlbumenJ]

LGTM
@CrazyHZM PTAL