Update dependency io.sf.carte:css4j to v6.2

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
io.sf.carte:css4j (source)	6.1.1 -> 6.2

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Release Notes

css4j/css4j (io.sf.carte:css4j)

v6.2

Compare Source

December 3, 2025

Highlights

if() function compliance update

Value ranges are now supported inside functions; this is required for parsing
and serializing the if() function as supported by the latest chromium-based
browsers.

Detail of changes

• nsac: support value ranges inside functions.
• Support value computation of tab-size and several text-* properties.
• Upgrade to JUnit 5.14.1.
• Upgrade to actions/checkout v6.

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