github-actions: bump step-security/harden-runner from 2.10.1 to 2.10.… #125

Job	Run time
thread-1-4-gcc-m32	10m 8s
thread-1-4-gcc-m64	11m 20s
thread-1-4-clang-m32	9m 49s
thread-1-4-clang-m64	9m 28s
channel-manager-csl	3m 18s
expects	31m 46s
packet-verification-1-1-on-1-4	11m 27s
packet-verification-low-power	9m 58s
thread-1-4-posix	9m 0s
upload-coverage	0s
	1h 46m 14s

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