fix(deps): update dependency @netlify/plugins-list to ^6.28.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@​netlify/plugins-list	^6.27.0 -> ^6.28.0

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[github-actions]

📊 Benchmark results

Comparing with b70313a

Package size: 221 MB

⬇️ 0.00% decrease vs. b70313a

^          291 MB  294 MB  294 MB  294 MB  294 MB         
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└───┴──┴────┴──┴────┴──┴────┴──┴────┴──┴────┴──┴────┴──┴──>
    T-6     T-5     T-4     T-3     T-2     T-1      T    

Legend

• T-6 (b70313a): 221 MB
• T-5 (8f64f93): 291 MB
• T-4 (76f209f): 294 MB
• T-3 (af6bc38): 294 MB
• T-2 (8ded8fb): 294 MB
• T-1 (33c931b): 294 MB
• T (current commit): 221 MB