Build(deps): Bump docker/build-push-action from 6 to 7 #396

Job	Run time
Test BaSyx Kafka Example	1m 59s
Test BaSyx DataBridge Example	1m 56s
Test BaSyx Client Example	3m 4s
Test BaSyx Dynamic RBAC Example	4m 2s
Test BaSyx Reverse Proxy Example	1m 24s
Test BaSyx Minimal Example	1m 49s
Test BaSyx Node-RED Example	1m 51s
Test BaSyx CAD file Example	1m 33s
Test BaSyx Secured Example	2m 14s
Test BaSyx Query Language Example	2m 52s
Test BaSyx Operation Delegation Example	2m 51s
	25m 35s

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