Fix CI on `next` #4301

Job	Run time
Build docs	1m 2s
Examples	5m 58s
Test (macOS)	4m 30s
Check minimal versions	1m 6s
Test (nightly)	5m 48s
Test (stable)	4m 44s
MSRV	0s
Test (beta)	5m 40s
Test (Windows)	10m 11s
Test (native-tls)	6m 44s
Test (no default features)	54s
Test (no cache)	4m 18s
Test (no gateway)	3m 14s
Test (unstable Discord API features)	1m 33s
Test (simd-json)	5m 17s
Test (chrono, chrono)	58s
Test (builder without model, builder, true)	40s
Test (unstable Discord API (no default features), unstable_discord_api, true)	39s
	1h 3m 16s

Provide feedback