Update dependency maven to v3.8.6

This MR contains the following updates:

Package	Type	Update	Change
maven	ironbank-docker	patch	3.8.5-openjdk-8 -> 3.8.6-openjdk-8
maven		patch	3.8.5 -> 3.8.6
maven	stage	patch	3.8.5-openjdk-8 -> 3.8.6-openjdk-8

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