chore(deps): update dependency @netlify/build to ^29.28.0 #2433

Job	Run time
setup	1m 6s
test (app-dir/index.test.ts)	18m 49s
test (app-dir/rsc-basic.test.ts)	4m 54s
test (app-dir/next-font.test.ts)	1m 31s
test (app-dir/root-layout.test.ts)	1m 25s
test (app-dir/rendering.test.ts)	3m 50s
test (app-dir/app-middleware.test.ts)	2m 59s
test (app-dir/app-edge.test.ts)	1m 26s
test (app-dir/asset-prefix.test.ts)	3m 5s
test (app-dir/trailingslash.test.ts)	3m 27s
test (app-dir/with-babel.test.ts)	3m 16s
test (app-dir/async-component-preload.test.ts)	1m 25s
Report appDir e2e test results	18s
	47m 31s

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