Use Pybind11 3.0.3 to build dpnp

[antonwolfy]

The PR updates CMakeLists.txt to bump pybind11 3.0.3 up from 3.0.2 version.

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[github-actions]

View rendered docs @ https://intelpython.github.io/dpnp/index.html

[github-actions]

Array API standard conformance tests for dpnp=0.20.0dev5=py313h509198e_6 ran successfully.
Passed: 1354
Failed: 3
Skipped: 16

[coveralls]

coverage: 82.034%. remained the same
when pulling 988da7d on bump-pybind11-version-to-v3.0.3
into d838c4b on master.

[vlad-perevezentsev]

LGTM
Thank you @antonwolfy