fix(docker): fix memory limit suffix in docker compose

[huangjw806]

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What's changed and what's your intention?

fix (https://buildkite.com/risingwavelabs/integration-tests/builds/335) caused by[#13343 ]

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)

[codecov]

Codecov Report

Merging #13382 (b005f22) into main (b10238c) will decrease coverage by 0.07%.
Report is 6 commits behind head on main.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main   #13382      +/-   ##
==========================================
- Coverage   67.84%   67.78%   -0.07%     
==========================================
  Files        1526     1526              
  Lines      259835   259835              
==========================================
- Hits       176290   176128     -162     
- Misses      83545    83707     +162     

Flag	Coverage Δ
rust	67.78% <ø> (-0.07%)	⬇️

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see 18 files with indirect coverage changes

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