chore(deps): update contract to v16 (major)

This MR contains the following updates:

Package	Update	Change
odoo-addon-contract	major	==15.0.1.10.0 -> ==16.0.2.8.1.2
odoo-addon-contract-sale	major	==15.0.1.1.0.2 -> ==16.0.1.2.0

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