Bump docker/build-push-action from 6.8.0 to 6.9.0 (#6465) #9655

Job	Run time
Code Style checks	37s
ShellCheck	7s
PHP 8.1 / PHPStan analysis	1m 36s
PHP 8.1 / Integration tests	22s
PHP 8.1 / PHPUnit tests	17s
PHP 8.1 / Generated Code consistency checks	11s
PHP 8.2 / Generated Code consistency checks	13s
PHP 8.2 / Integration tests	16s
PHP 8.2 / PHPStan analysis	1m 28s
PHP 8.2 / PHPUnit tests	14s
PHP 8.3 / Generated Code consistency checks	7s
PHP 8.3 / Integration tests	19s
PHP 8.3 / PHPStan analysis	1m 25s
PHP 8.3 / PHPUnit tests	18s
	7m 30s

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