Bump step-security/harden-runner from 2.9.0 to 2.9.1 (#248) #534

Job	Run time
Build (ubuntu, x64, openssl, static)	1m 52s
Build (ubuntu, x64, openssl, shared)	1m 53s
Build (windows, x86, schannel, static)	5m 45s
Build (windows, x86, schannel, shared)	4m 39s
Build (windows, x86, openssl, static)	5m 16s
Build (windows, x86, openssl, shared)	6m 20s
Build (windows, x64, schannel, static)	3m 32s
Build (windows, x64, schannel, shared)	5m 14s
Build (windows, x64, openssl, static)	5m 52s
Build (windows, x64, openssl, shared)	4m 41s
	45m 4s

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