chore(deps): Bump actions/attest-sbom from 2.0.1 to 2.1.0 in /.github/actions/build-docker-image #1026

Job	Run time
Prepare build matrix	4s
Build Docker image (ref: 6.7.1, tag: 6.7)	55s
Build Docker image (ref: 6.6.2, tag: 6.6)	58s
Build Docker image (ref: 6.5.5, tag: 6.5)	1m 9s
Build Docker image (ref: 6.4.5, tag: 6.4)	1m 9s
Build Docker image (ref: 6.3.5, tag: 6.3)	1m 9s
Build Docker image (ref: 6.2.6, tag: 6.2)	1m 12s
Build Docker image (ref: 6.1.7, tag: 6.1)	52s
Build Docker image (ref: 6.0.9, tag: 6.0)	51s
Build Docker image (ref: , tag: trunk)	1m 13s
	9m 32s

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