Bump actions/checkout from 4.2.0 to 4.2.1 (#263) #562

Job	Run time
Build (ubuntu, x64, openssl, static)	1m 39s
Build (ubuntu, x64, openssl, shared)	1m 37s
Build (windows, x86, schannel, static)	3m 27s
Build (windows, x86, schannel, shared)	4m 3s
Build (windows, x86, openssl, static)	4m 41s
Build (windows, x86, openssl, shared)	4m 51s
Build (windows, x64, schannel, static)	3m 43s
Build (windows, x64, schannel, shared)	3m 23s
Build (windows, x64, openssl, static)	4m 54s
Build (windows, x64, openssl, shared)	5m 17s
	37m 35s

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