### Bug description

````
quarto create-project website-with-ext --type website
cd .\website-with-ext\
quarto install extension quarto-ext/code-filename
mkdir more
echo "---" > more/index.qmd
echo "filters:" >> more/index.qmd
echo "  - code-filename" >> more/index.qmd
echo "---" >> more/index.qmd
quarto render
````

Content for `more/index.qmd` is really simple for the sake of the reprex
````
---
filters:
  - code-filename
---
````

This is the issue we get 
````
> quarto render
[1/3] about.qmd
[2/3] index.qmd
[3/3] more\index.qmd
Error running filter _extensions/quarto-ext/code-filename/code-filename.lua:
cannot open _extensions/quarto-ext/code-filename/code-filename.lua: No such file or directory
````

It seems we have an issue with Pandoc when an extensions filter is used in a subfolder. 
The error above is from Pandoc. `pandoc` CLI is run in which environment ? It seems that the lua filter is not found because path is relative to where Pandoc is run and lua filter is not among the data files folder.



Using last dev version. 


2022-07-12T11:49:55Z
cderv
bug
closed
Using filter extensions from document in subfolder makes pandoc error
https://github.com/quarto-dev/quarto-cli/issues/1361