Bump to click>8 for safety alert

[legoktm]

Status

Ready for review

Description of Changes

Bump to click>8 to address safety alert for pallets/click#1752.

Testing

• Verify CI passes

Deployment

Any special considerations for deployment? No

Checklist

• Linting (make lint) and tests (make test) pass in the development container
• I have opened a PR in the docs repo for these changes, or will do so later: Upgrade to click>8 for safety alert securedrop-docs#329

[codecov-commenter]

Codecov Report

Merging #6381 (d6afa4f) into develop (50c2d0e) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #6381   +/-   ##
========================================
  Coverage    83.98%   83.98%           
========================================
  Files           61       61           
  Lines         4302     4302           
  Branches       523      523           
========================================
  Hits          3613     3613           
  Misses         565      565           
  Partials       124      124           

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