fix: use sh on path

[stephen-huan]

This reverts a change in 2dc2a54 that I believe is tangential to the issue that the commit addresses. This makes it more consistent with the default value of the 'shell' option and the rest of the file. Personally, I have a different sh on $PATH than /bin/sh (actually, I do not have /bin/sh at all), which is how I noticed the change.

vimtex/autoload/vimtex/jobs/neovim.vim

Lines 155 to 162 in 5ac62e0

	function! s:neovim_unix_run(cmd) abort " {{{1
	call system(['sh', '-c', a:cmd])
	endfunction
	" }}}1
	function! s:neovim_unix_capture(cmd) abort " {{{1
	return systemlist(['sh', '-c', a:cmd])
	endfunction

vimtex/autoload/vimtex/jobs/vim.vim

Lines 182 to 185 in 5ac62e0

	let s:shell = executable('sh')
	\ ? 'sh'
	\ : (executable('/usr/bin/sh')
	\ ? '/usr/bin/sh' : '/bin/sh')

[lervag]

Thanks, I agree that this seems an unintended side effect.