Bump canonicalwebteam.discourse to 5.4.3

[jpmartinspt]

Done

Bump canonicalwebteam.discourse to 5.4.3

QA

• Check out this feature branch
• Run the site using the command ./run serve
• View the site locally in your web browser at: http://0.0.0.0:8027/
• Browse the discourse powered sections in the demo environment and check they work.

[webteam-app]

Demo starting at https://microk8s-io-626.demos.haus

[codecov[bot]]

Codecov Report

Merging #626 (b32e9ce) into main (09fc116) will not change coverage. Report is 1 commits behind head on main. The diff coverage is n/a.

:exclamation: Current head b32e9ce differs from pull request most recent head 48051a2. Consider uploading reports for the commit 48051a2 to get more accurate results

@@           Coverage Diff           @@
##             main     #626   +/-   ##
=======================================
  Coverage   83.78%   83.78%           
=======================================
  Files           2        2           
  Lines          74       74           
=======================================
  Hits           62       62           
  Misses         12       12           

Flag	Coverage Δ
python	83.78% <ø> (ø)

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