Pin docker publish workflow to Ubuntu 22

[ndegwamartin]

IMPORTANT: Where possible all PRs must be linked to a Github issue

Pin to Ubuntu v22.04

• Resolves Docker Publish workflow fails

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.44%. Comparing base (9248065) to head (4ca814c).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #123   +/-   ##
=========================================
  Coverage     63.44%   63.44%           
  Complexity      235      235           
=========================================
  Files            16       16           
  Lines          1603     1603           
  Branches        201      201           
=========================================
  Hits           1017     1017           
  Misses          485      485           
  Partials        101      101           

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