Fix database password escaping

[jemrobinson]

:white_check_mark: Checklist

• [x] You have given your pull request a meaningful title (e.g. Enable foobar integration rather than 515 foobar).
• [x] You are targeting the appropriate branch. If you're not certain which one this is, it should be develop.
• [x] Your branch is up-to-date with the target branch (it probably was when you started, but it may have changed since then).

:vertical_traffic_light: Depends on

n/a

:arrow_heading_up: Summary

Fix incorrect mustache expansion of database password as this might contain HTML entities

:closed_umbrella: Related issues

Closes #2123

:microscope: Tests

n/a

[github-actions[bot]]

Coverage report

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
data_safe_haven/infrastructure
project_manager.py					82, 277
data_safe_haven/infrastructure/programs/sre
gitea_server.py					339, 353
hedgedoc_server.py					318, 332
user_services.py					97, 122
workspaces.py					59-60
data_safe_haven/logging
logger.py
plain_file_handler.py
Project Total

This report was generated by python-coverage-comment-action

[JimMadge]

@jemrobinson has this been tested?

[craddm]

I'm testing it now

[JimMadge]

@craddm Did it work for you?

[craddm]

Confirmed working