Clarify dpnp.reshape docstring

[antonwolfy]

Updates the dpnp.reshape docstring summary line (and the corresponding "See Also" reference in dpnp.ndarray) to clarify that it returns a reshaped array, preventing confusion about whether it modifies the array in-place.

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[vlad-perevezentsev]

LGTM
Thank you @antonwolfy

[github-actions]

View rendered docs @ https://intelpython.github.io/dpnp/pull/2964/index.html

[coveralls]

coverage: 78.084% (+0.002%) from 78.082% — update-reshape-docstring into master

[github-actions]

Array API standard conformance tests for dpnp=0.21.0dev1=py313h509198e_19 ran successfully.
Passed: 1357
Failed: 3
Skipped: 16