Fix hljs code highlighting to preserve line breaks in Markdown rendering

[cstns]

Description

fix inline code indentation. switched order of pre and code blocks in the markdown renderer to preserve indentation

Related Issue(s)

relates to #7049

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production
• Link to Changelog Entry PR, or note why one is not needed.

Labels

• Includes a DB migration? -> add the area:migration label

[Steve-Mcl]

confirmed

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.29%. Comparing base (fff41da) to head (7331842).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7058   +/-   ##
=======================================
  Coverage   76.29%   76.29%           
=======================================
  Files         405      405           
  Lines       20348    20348           
  Branches     4895     4895           
=======================================
  Hits        15525    15525           
  Misses       4823     4823           

Flag	Coverage Δ
backend	76.29% <ø> (ø)

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.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.