Update format_spec.md #46

Job	Run time
Build Release (ubuntu_18.04, linux/amd64)	3m 54s
Build Release (ubuntu_18.04, linux/arm64)	39m 56s
Build Release (ubuntu_20.04, linux/amd64)	4m 42s
Build Release (ubuntu_20.04, linux/arm64)	41m 45s
Build Release (ubuntu_22.04, linux/amd64)	4m 54s
Build Release (ubuntu_22.04, linux/arm64)	42m 58s
Build Release (centos_7, linux/amd64)	5m 20s
Build Release (centos_7, linux/arm64)	42m 42s
Build Release (centos_8, linux/amd64)	7m 19s
Build Release (centos_8, linux/arm64)	1h 1m 4s
Build Release (mcr.microsoft.com/cbl-mariner/base/core_2.0, linux/amd64)	5m 8s
Build Release (mcr.microsoft.com/cbl-mariner/base/core_2.0, linux/arm64)	54m 24s
Development Release	23s
Tagged Release	0s
	5h 14m 29s

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