fix(deps): update dependency @netlify/build to ^26.3.12

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@netlify/build	^26.3.10 -> ^26.3.12

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Release Notes

netlify/build

v26.3.12

Compare Source

v26.3.11

Compare Source

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Configuration

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[github-actions]

📊 Benchmark results

Comparing with 5232a86

Package size: 443 MB

⬇️ 0.00% decrease vs. 5232a86

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Legend

• T-30 (5232a86): 443 MB
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• T-12 (88985c4): 443 MB
• T-11 (110eed6): 443 MB
• T-10 (cd3787c): 443 MB
• T-9 (d9f62e0): 443 MB
• T-8 (fad5ef6): 443 MB
• T-7 (5ea7686): 447 MB
• T-6 (483f51a): 447 MB
• T-5 (7ef657d): 447 MB
• T-4 (2decc3e): 447 MB
• T-3 (69261cd): 443 MB
• T-2 (0c0fded): 443 MB
• T-1 (9155efb): 443 MB
• T (current commit): 443 MB

[kodiakhq]

This PR currently has a merge conflict. Please resolve this and then re-add the automerge label.