[Snyk] Security upgrade ubuntu from 16.04 to xenial-20210416#5

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-695c1361bddedde17e6204a219c21963

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Commits on Dec 31, 2021

fix: ansible/roles/asdf/tests/Dockerfile-ubuntu16.04 to reduce vulnerabilities
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