Changing wiki.style to "file-stem" should affect the completions preview

[Feel-ix-343]

Using neovim with version 2023-7-25

here is my .marksman.toml

[code_action]
# Enable/disable "Table of Contents" code action
toc.enable = false

[completion]
# The style of wiki links completion.
# Other values include: 
# * "file-stem" to complete using file name without an extension,
# * "file-path-stem" same as above but using file path.
wiki.style = "file-stem"

located in project root.

When the completion is selected, it will use the file name, but in the preview, it is only using the #{heading} in the file.

I would prefer that the file name is shown in the preview.