chore(deps): update ghcr.io/diamondlightsource/ubuntu-devcontainer:noble docker digest to ff55e6b

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ghcr.io/diamondlightsource/ubuntu-devcontainer	final	digest	3df41b0 → ff55e6b

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (c10092d) to head (8e427f9).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #286   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           28        28           
  Lines          638       638           
=========================================
  Hits           638       638           

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