Werk #13896: Update postgres from 10.12 to 10.20

Component	Core & setup
Title	Update postgres from 10.12 to 10.20
Date	Mar 30, 2022
Level	Trivial Change
Class	Security Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.0.0p23 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

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