Bump follow-redirects from 1.14.8 to 1.15.4 in /website #1988

Job	Run time
conformance	4m 5s
build (2_12, mima)	1m 24s
build (2_12, e2e)	5s
build (2_12, test)	9m 57s
build (2_13, mima)	1m 21s
build (2_13, e2e)	5s
build (2_13, test)	8m 56s
build (3, mima)	7s
build (3, e2e)	7s
build (3, test)	9m 4s
build (2_12, examples_and_formatting)	2m 51s
build (2_13, scala3_compat_test)	7m 27s
build (3, scala3_compat_test)	8m 29s
ci-passed	1s
	53m 59s

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