Bump follow-redirects from 1.15.5 to 1.15.6 in /tests_e2e/bot #211

Job	Run time
Build / Prepare	1s
Build / Build / Gradle build	1m 25s
E2E test (1.12.2, bungeecord) / E2E test (1.12.2, bungeecord)	1m 13s
E2E test (1.13.2, bungeecord) / E2E test (1.13.2, bungeecord)	1m 24s
E2E test (1.12.2, velocity) / E2E test (1.12.2, velocity)	1m 33s
E2E test (1.13.2, velocity) / E2E test (1.13.2, velocity)	1m 19s
E2E test (1.16.3, bungeecord) / E2E test (1.16.3, bungeecord)	1m 20s
E2E test (1.16.3, velocity) / E2E test (1.16.3, velocity)	1m 26s
E2E test (1.16.5, bungeecord) / E2E test (1.16.5, bungeecord)	1m 57s
E2E test (1.16.5, velocity) / E2E test (1.16.5, velocity)	1m 12s
E2E test (1.20.4, bungeecord) / E2E test (1.20.4, bungeecord)	2m 18s
E2E test (1.20.4, velocity) / E2E test (1.20.4, velocity)	1m 43s
E2E test (1.8.9, bungeecord) / E2E test (1.8.9, bungeecord)	1m 17s
E2E test (1.8.9, velocity) / E2E test (1.8.9, velocity)	1m 24s
	19m 32s

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