[Snyk] Security upgrade sphinx from 1.2.3 to 3.0.4#5

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puppet-sec-bot wants to merge 1 commit intoenabled_serialfrom

snyk-fix-5ee62021caec5e0dd1791e31bdc6de28

Commits on May 13, 2022

fix: test-requirements.txt to reduce vulnerabilities
snyk-bot
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