fix(ci): iceberg sink test failure

[liurenjie1024]

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What's changed and what's your intention?

See https://buildkite.com/risingwavelabs/main-cron/builds/861#018aaf19-2ac2-4d4f-9331-40f910d0c36d

Checklist

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
• I have added fuzzing tests or opened an issue to track them. (Optional, recommended for new SQL features Sqlsmith: Sql feature generation #7934).
• My PR contains breaking changes. (If it deprecates some features, please create a tracking issue to remove them in the future).
• All checks passed in ./risedev check (or alias, ./risedev c)
• My PR changes performance-critical code. (Please run macro/micro-benchmarks and show the results.)

• My PR contains critical fixes that are necessary to be merged into the latest release. (Please check out the details)

Documentation

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Release note

If this PR includes changes that directly affect users or other significant modifications relevant to the community, kindly draft a release note to provide a concise summary of these changes. Please prioritize highlighting the impact these changes will have on users.

[liurenjie1024]

cc @BugenZhao for Cargo.lock

[codecov]

Codecov Report

Merging #12446 (af0ecef) into main (8431a44) will decrease coverage by 0.01%.
Report is 9 commits behind head on main.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main   #12446      +/-   ##
==========================================
- Coverage   69.64%   69.64%   -0.01%     
==========================================
  Files        1422     1422              
  Lines      235747   235767      +20     
==========================================
+ Hits       164182   164189       +7     
- Misses      71565    71578      +13     

Flag	Coverage Δ
rust	69.64% <0.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
src/connector/src/sink/iceberg.rs	16.56% <0.00%> (-1.13%)	⬇️

... and 2 files with indirect coverage changes

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[BugenZhao]

for Cargo.lock