publicationTitle variable adding extra asterisks in md export

[sutzig]

Describe the bug
When using the Mdnotes > Export to markdown function, the resulting markdown file appends two asterisks before the {{publicationTitle}} value.

To Reproduce
Steps to reproduce the behavior:

1. Go to Zotero 6.0
2. Right-click on an entry
3. Scroll down to Mdnotes > Export to markdown
4. Open resulting .md files in editor

Expected behavior
No added asterisks before metadata value

Screenshots

Desktop (please complete the following information):

• OS: MacOS Monterey 12.3
• Zotero version: 6.0
• Mdnotes version: 0.1.3
• Zotfile version: 5.1.0
• BetterBibtex version: 6.2.14

Additional context

• The extensions.mdnotes.placeholder.publicationTitle is defined as {"content":"{{bullet}} Journal:: {{field_contents}}", "field_contents": "{{content}}", "link_style": "wiki"}

• This only occurs with the extensions.mdnotes.placeholder.publicationTitle variable; all other variables are returning accurate data