Bump follow-redirects from 1.15.5 to 1.15.6 (#1071) #1735

Job	Run time
build (ubuntu, >=20,<21, >=4.1.0,<5.0.0a0, >=4)	2m 56s
jstest/lint (ubuntu, >=20,<21, >=4.1.0,<5.0.0a0, >=4)	5m 11s
atest ubuntu py3.8 r>=4	31m 26s
atest ubuntu py3.11 r>=4	35m 43s
smoke source install ubuntu py3.8 lab>=4.1.0,<5	1m 57s
atest macos py3.8 r>=4	42m 43s
smoke source install ubuntu py3.11 lab>=4.1.0,<5	2m 1s
atest macos py3.11 r>=4	41m 8s
atest windows py3.8 r>=4	35m 39s
atest windows py3.11 r>=4	41m 48s
smoke ubuntu py3.8	40s
smoke ubuntu py3.11	35s
smoke ubuntu pypypy-3.8	1m 29s
smoke macos py3.8	1m 7s
smoke macos py3.11	45s
smoke macos pypypy-3.8	1m 44s
smoke windows py3.8	1m 53s
smoke windows py3.11	1m 36s
smoke windows pypypy-3.8	5m 19s
	4h 15m 40s

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