build(deps): bump docker/build-push-action from 4.0.0 to 6.9.0 #1031

Job	Run time
Code Formatting	26s
Linting	39s
icatdb Generator Script Consistency Test	18m 58s
Pip Install 3.6 Test	39s
Pip Install 3.7 Test	35s
Dependency Safety	25s
Python 3.6 Build & Tests	13m 49s
Pip Install 3.8 Test	33s
Python 3.7 Build & Tests	13m 54s
Pip Install 3.9 Test	31s
Pip Install 3.10 Test	34s
Python 3.8 Build & Tests	13m 35s
Python 3.9 Build & Tests	13m 50s
Python 3.10 Build & Tests	15m 2s
Docker	0s
	1h 33m 30s

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