Update doc/nvim-tree-lua.txt

Co-authored-by: Alexander Courtis <alex@courtis.org>

Author: gegoune

doc/nvim-tree-lua.txt

@@ -1608,7 +1608,7 @@ node.open.vertical()                      *nvim-tree-api.node.open.vertical()*
 node.open.horizontal()                  *nvim-tree-api.node.open.horizontal()*
     |nvim-tree-api.node.edit()|, file will be opened in a new horizontal split.
 
-node.open.drop()                               *nvim-tree-api.node.open.tab()*
+node.open.drop()                              *nvim-tree-api.node.open.drop()*
     Switch to window with selected file if it exists.
     Open file in current window otherwise.
     See: `:h :drop`.