Update docker/setup-buildx-action action to v4.3.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
docker/setup-buildx-action	action	minor	v4.2.0 → v4.3.0

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Release Notes

docker/setup-buildx-action (docker/setup-buildx-action)

v4.3.0

Compare Source

• Bump @​docker/actions-toolkit from 0.92.0 to 0.95.0 in #​595
• Bump brace-expansion from 1.1.13 to 1.1.18 in #​600
• Bump js-yaml from 5.2.0 to 5.3.0 in #​585
• Bump postcss from 8.5.10 to 8.5.25 in #​598
• Bump undici from 6.27.0 to 6.28.0 in #​601

Full Changelog: docker/setup-buildx-action@v4.2.0...v4.3.0

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[jameslamb]

/merge