Update sonarqube Docker tag to v9.9.6

This MR contains the following updates:

Package	Type	Update	Change
sonarqube		patch	9.9.5-developer -> 9.9.6-developer
sonarqube	ironbank-docker	patch	9.9.5-developer -> 9.9.6-developer
sonarqube	stage	patch	9.9.5-developer -> 9.9.6-developer

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