Fix typo emebd -> embed (#2911) #909

Job	Run time
Build docs	51s
Test (macOS)	1m 46s
Examples	4m 24s
Check minimal versions	1m 2s
MSRV	1m 1s
Test (nightly)	3m 32s
Test (stable)	3m 13s
Test (beta)	3m 29s
Test (Windows)	7m 4s
Test (native-tls)	2m 55s
Test (no default features)	54s
Test (no cache)	3m 5s
Test (no gateway)	1m 50s
Test (unstable Discord API features)	3m 27s
Test (simd-json)	3m 21s
Test (chrono, chrono)	46s
Test (unstable API + typesize, default unstable_discord_api typesize, true)	1m 9s
Test (builder without model, builder, true)	33s
Test (unstable Discord API (no default features), unstable_discord_api, true)	30s
	44m 52s

Provide feedback