upgrade nvim-tree

meant to fix nvim-tree/nvim-tree.lua#2624
which I've been seeing from time to time.

Author: emmanueltouzery

init.lua

@@ -753,7 +753,7 @@ callbacks = {
   end}
   use {
     -- hopefully temporarily using my fork due to https://github.com/stevearc/stickybuf.nvim/issues/24
-    'emmanueltouzery/nvim-tree.lua', commit='0a9ae9d40c2e03819706eccc717389f563ffe0ac',
+    'emmanueltouzery/nvim-tree.lua', commit='0348894128e41ab4c944945e7543f3a727de297d',
     requires = { 'nvim-tree/nvim-web-devicons', commit='9ab9b0b894b2388a9dbcdee5f00ce72e25d85bf9' },
     -- for some reason must call init outside of the config block, elsewhere
     -- config = function() require'nvim-tree'.setup {} end