Ignore invalid bytes in `ImageHash` conversion (#2586) #4418

Job	Run time
Examples	3m 43s
Test (macOS)	4m 1s
Build docs	34s
Check minimal versions	51s
MSRV	0s
Test (nightly)	6m 6s
Test (stable)	4m 49s
Test (beta)	3m 23s
Test (Windows)	5m 7s
Test (native-tls)	2m 52s
Test (no default features)	37s
Test (no cache)	5m 15s
Test (no gateway)	3m 19s
Test (unstable Discord API features)	1m 32s
Test (simd-json)	5m 55s
Test (chrono, chrono)	43s
Test (builder without model, builder, true)	35s
Test (unstable Discord API (no default features), unstable_discord_api, true)	24s
	49m 46s

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