[dMopp]

Release UmbrielMod 0.5.2.

Merging this tags v0.5.2 on main and publishes the GitHub release with
these notes (any merge method works):

Security

• Catalogue effects are checked including everything they include. An effect
  that passed the check could include another effect's effect.toml or any other
  file of the collection that sets keybinds or general.autostart; the live
  preview then loaded those while it was open. Includes now have to be another
  safe effect of the collection.
• The GitHub Actions in the workflows are pinned to commit SHAs (Dependabot keeps
  them current).

Fixed

• Installing or uninstalling an effect no longer saves other unsaved changes
  without asking, and a failed installation leaves no files behind.
• The live preview only runs for the configuration Umbriel is using and switches
  back to exactly that file. With umbrielmod -c other.toml it used to leave the
  compositor on other.toml.
• Edited includes outside the config directory (../noctalia/x.toml) are
  validated with their changes before saving, not in the version on disk.
• After switching the interface language, update checks and the update banner
  work in the new window.
• Shader constants never get nan or inf, which GLSL cannot read.
• Unvalidated values such as position = [0], scale = 0 or include = "x"
  no longer crash the outputs page or saving.
• install.sh --branch and --version without a value print an error instead
  of "unbound variable".