chore(deps): update dependency postcss-import to v17

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss-import	16.1.1 → 17.0.0

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Release Notes

postcss/postcss-import (postcss-import)

v17.0.0

Compare Source

• BREAKING: Now requires Node v22+ (#​609)
• BREAKING: Files with the same content, but different paths, will no longer be skipped as duplicates. This should not affect the vast majority of users. (#​601, #​602)

v16.2.0

Compare Source

• Better whitespace formatting on modern postcss versions (#​605)
• Better error message when @imports are interleaved with @layers (#​566, #​606)
• Docs clarification (#​598)

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