[AUTO-BACKPORT 10161] fix: fix diffusion example [DET-10470]

[github-actions]

Backport 85a5d22 from #10161.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 54.34%. Comparing base (c69aa68) to head (0523154).
Report is 1 commits behind head on release-0.38.0.

Additional details and impacted files

@@                Coverage Diff                 @@
##           release-0.38.0   #10169      +/-   ##
==================================================
+ Coverage           54.32%   54.34%   +0.01%     
==================================================
  Files                1259     1259              
  Lines              157293   157293              
  Branches             3642     3642              
==================================================
+ Hits                85451    85476      +25     
+ Misses              71709    71684      -25     
  Partials              133      133              

Flag	Coverage Δ
backend	46.14% <ø> (+0.04%)	⬆️
harness	71.13% <ø> (ø)
web	54.29% <ø> (ø)

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see 6 files with indirect coverage changes