Update dependency owasp/zap2docker-stable to v2.12.0

This MR contains the following updates:

Package	Type	Update	Change
owasp/zap2docker-stable	ironbank-docker	minor	2.11.1 -> 2.12.0
owasp/zap2docker-stable		minor	v2.11.1 -> 2.12.0
owasp/zap2docker-stable	stage	minor	2.11.1 -> 2.12.0

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