Update node version in integration tests workflow

[Swiddis]

Description

Resolving an old todo, in response to the breaking upstream bootstrap change that is causing our CI to fail bootstrap.

Issues Resolved

Part of longstanding work on #1040

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• Commits are signed per the DCO using --signoff

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[Swiddis]

Example run with passing bootstrap step: https://github.com/Swiddis/dashboards-observability/actions/runs/6908440468/job/18797733741

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (43a044f) 44.06% compared to head (504be54) 44.06%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1260   +/-   ##
=======================================
  Coverage   44.06%   44.06%           
=======================================
  Files         329      329           
  Lines       19682    19682           
  Branches     4685     4685           
=======================================
  Hits         8673     8673           
  Misses      10964    10964           
  Partials       45       45           

Flag	Coverage Δ
dashboards-observability	44.06% <ø> (ø)

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