Update layers/meta-balena digest to 940bdd4 #1887

Job	Run time
Yocto / Approved commit	2s
Yocto / Source mirror IAM role	3s
Yocto / Device info	52s
Yocto / Build	16m 5s
Yocto / All jobs (radxa-zero-s905y2, balena-cloud.com)	2s
Yocto / Deploy to S3	-1s
Yocto / Deploy AMI	-1s
Yocto / Deploy hostApp	-1s
Yocto / Test	-1s
	17m 0s

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