test(deps): update dependency copier to v9.4.1 (main)

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
copier	9.3.1 -> 9.4.1

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Release Notes

copier-org/copier (copier)

v9.4.1

Compare Source

Fix

• restore support for preserve_symlinks: false for directories (#​1820)

v9.4.0

Compare Source

Fix

• exclude: support negative exclude matching child of excluded parent
• parse new answer when --skip-answered is used
• validate answers to secret questions
• updating: do not recreate deleted paths on update (#​1719)
• support Git config without user identity

Refactor

• set default value for keep_trailing_newline more idiomatically
• drop support for Python 3.8

Perf

• updating: avoid creating subproject copy

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