Renovate Update outofcoffee/imposter Docker tag to v4

[renovate]

This PR contains the following updates:

Package	Update	Change
outofcoffee/imposter	major	3.40.0 -> 4.0.3

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.29%. Comparing base (f00760a) to head (cc8fa5d).
Report is 7 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2713      +/-   ##
============================================
+ Coverage     91.25%   91.29%   +0.03%     
- Complexity     1504     1515      +11     
============================================
  Files           309      311       +2     
  Lines          6393     6421      +28     
============================================
+ Hits           5834     5862      +28     
  Misses          542      542              
  Partials         17       17              

Flag	Coverage Δ
use-an-lpa-admin	79.26% <ø> (ø)
use-an-lpa-api	97.39% <ø> (+0.02%)	⬆️
use-an-lpa-front	89.54% <ø> (ø)

[cooperaj]

Going to test this locally as it only affect dev work so this won't have broken anything in the CI build