Pin Prettier VSCode extension

Starting with prettier-vscode version 12.4.0, untrusted workspaces now
no longer load Prettier configuration files. This breaks the ability to
format Git commit and tag messages (6225082, 92381de) if the
VSCode/VSCodium workspace is opened in restricted mode.

This commit will pin the extension to the previous version until a fix
is available.

- https://github.com/prettier/prettier-vscode/releases/tag/v12.4.0
- prettier/prettier-vscode#3972
- prettier/prettier-vscode#3974

Author: br3ndonland

vscode/extensions/marketplace-open-vsx.txt

@@ -6,7 +6,7 @@ detachhead.basedpyright
 dracula-theme.theme-dracula
 eamodio.gitlens
 editorconfig.editorconfig
-esbenp.prettier-vscode
+esbenp.prettier-vscode@12.3.0
 github.vscode-github-actions
 golang.go
 # kilocode.kilo-code