chore(deps): update phpdocker/phpdocker docker tag to v7.4

This MR contains the following updates:

Package	Type	Update	Change
phpdocker/phpdocker	image	minor	7.3 -> 7.4
phpdocker/phpdocker	image	minor	7.2 -> 7.4
phpdocker/phpdocker	image	minor	7.1 -> 7.4

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