[RELEASE ONLY CHANGES] Update version references in docs for 1.2 rele… #6

Job	Run time
prepare	4s
release-qnn / check-if-aar-exists	3s
release-vulkan / check-if-aar-exists	4s
release-xnnpack / check-if-aar-exists	10s
release-qnn / build-aar / linux-job	18m 5s
release-vulkan / build-aar / linux-job	17m 48s
release-xnnpack / build-aar / linux-job	16m 25s
release-xnnpack / upload-release-aar	17s
release-vulkan / upload-release-aar	14s
release-qnn / upload-release-aar	14s
	53m 24s

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