fix: Tangle should close fd for files (#1618)

The current implementation keeps the fd open for each file it is
tangling, which results in tangled shell scripts not being able to be
run until the instance is closed

Co-authored-by: Jimmyscene <[email protected]>

Author: Jimmyscene

lua/neorg/modules/core/tangle/module.lua

@@ -526,6 +526,7 @@ module.on_event = function(event)
                         )
                     end
                 end)
+                vim.uv.fs_close(fd)
             end)
         end
     end