chore(deps): update dependency rules_python to v1.8.4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
rules_python	bazel_dep	patch	1.8.3 → 1.8.4

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Release Notes

bazel-contrib/rules_python (rules_python)

v1.8.4

Compare Source

Fixed

• (pipstar): A corner case of evaluation of version specifiers ("1.2" ~= "1.2.0")
  has been fixed improving compatibility with the PEP440 standard.
  Fixes #​3580.
• (pipstar): We now add read permissions after extracting wheels for the cases
  where the whl file is missing them.
  Fixes #​3554.

{#v1-8-3}

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