chore: Increase maximum binary diff size in metrics check

[denrase]

#skip-changelog

📜 Description

Bumps diffMax, as it's the only thing blocking #5668, and we discussed we should do this sepratley.

#5678

[philprime]

LGTM

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.647%. Comparing base (f262e10) to head (e479af0).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #5869       +/-   ##
=============================================
- Coverage   86.663%   86.647%   -0.017%     
=============================================
  Files          423       423               
  Lines        36405     36405               
  Branches     17230     17229        -1     
=============================================
- Hits         31550     31544        -6     
- Misses        4809      4814        +5     
- Partials        46        47        +1     

see 8 files with indirect coverage changes

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