Context awareness in pandoc files is not working

[FelipeCybis]

Hey, thanks for the awesome plugin!

I started testing it recently, but I had difficulty using the context awareness in pandoc-like files.

After some debugging I am pretty sure this is the root:
In telescope-bibtex.utils.parsePandoc we have this last for loop to get the bib filename.

telescope-bibtex.nvim/lua/telescope-bibtex/utils.lua

Lines 206 to 217 in 289a6f8

	for _, bib in ipairs(bibs) do
	local rel_bibs = M.extendRelativePath(bib)
	local found = nil
	if M.fileExists(bib) then
	found = bib
	elseif M.fileExists(rel_bibs) then
	found = rel_bibs
	end
	if found ~= nil then
	table.insert(files, bib)
	end
	end

but if bib file do not exist and rel_bibs exist. it should insert rel_bibs and not bib. In other words, it should insert found.

With this fix, it seems to work as intended and as it works in latex files.