Update canonicalwebteam.discourse to 5.6.0

[petesfrench]

Done

• Update canonicalwebteam.discourse to 5.5.0

QA

• Go to https://dqlite-io-296.demos.haus/docs
• Inspect a heading (h2 and down) and see the anchor link within it doesn't have trailing number

[webteam-app]

Demo

Jenkins

demos.haus

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.19%. Comparing base (af0a015) to head (35ecf99).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #296      +/-   ##
==========================================
+ Coverage   75.60%   76.19%   +0.58%     
==========================================
  Files           3        3              
  Lines          41       42       +1     
==========================================
+ Hits           31       32       +1     
  Misses         10       10              

Flag	Coverage Δ
python	76.19% <ø> (+0.58%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[britneywwc]

The demos are still failing, I tried rebuilding here https://jenkins.canonical.com/webteam/job/start-demo/24807/

[petesfrench]

Closing - there is a more recent PR here #298