Add missing dtypes.

[gleize]

My model contains some uint non trainable variables that triggered an exception when calling the model.summary() method.

I added the missing dtypes.

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[fchollet]

LGTM, thanks

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.01% ⚠️

Comparison is base (94b5361) 76.56% compared to head (6db20a4) 76.56%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #887      +/-   ##
==========================================
- Coverage   76.56%   76.56%   -0.01%     
==========================================
  Files         329      329              
  Lines       31429    31423       -6     
  Branches     6114     6111       -3     
==========================================
- Hits        24064    24058       -6     
  Misses       5786     5786              
  Partials     1579     1579              

Flag	Coverage Δ
keras_core	76.46% <100.00%> (-0.01%)	⬇️

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

Files Changed	Coverage Δ
keras_core/utils/dtype_utils.py	100.00% <100.00%> (ø)

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