github-actions: bump step-security/harden-runner from 2.9.1 to 2.10.1… #1

Job	Run time
channel-manager-csl	3m 24s
expects	31m 10s
packet-verification-1-1-on-1-4	12m 20s
packet-verification-low-power	10m 12s
thread-1-4-gcc-m32	11m 16s
thread-1-4-posix	9m 46s
thread-1-4-gcc-m64	11m 24s
thread-1-4-clang-10-m32	11m 15s
thread-1-4-clang-10-m64	10m 48s
upload-coverage	51s
	1h 52m 26s

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