Update python 3

[adamdockter-wk]

Story:

TODO

Acceptance Criteria:

• Code has been tested and results documented
• Unit tests have been updated
• Updates to documentation if necessary
• Verify and document changes to any other Messaging components
• Pull request made against the 'develop' branch, not master

Design Notes:

TODO

How To Test:

TODO

My Test Results:

TODO

Reviewers:

@Workiva/service-platform

[aviary3-wk]

Security Insights

(2) Image validation issues were detected

• (2) issues in Dockerfile
• Unapproved image(s) found in stage 0:
    drydock.workiva.net/workiva/messaging-docker-images:pr-86
• Unapproved image(s) found in stage 1:
    build

Action Items

• Verify all FROM and COPY --from images are approved
• Review PR for security impact; comment "security review required" if needed or unsure
• Verify aviary.yaml coverage of security relevant code

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