chore: use stdpath "log" rather than "cache" (#2372)

Author: alex-courtis

doc/nvim-tree-lua.txt

@@ -1332,8 +1332,8 @@ In the event of a problem please disable the experiment and raise an issue.
 Configuration for diagnostic logging.
 
     *nvim-tree.log.enable*
-    Enable logging to a file `nvim-tree.log` in |stdpath| `"cache"`, usually
-    `$XDG_CACHE_HOME/nvim`
+    Enable logging to a file `nvim-tree.log` in |stdpath| `"log"`, usually
+    `${XDG_STATE_HOME}/nvim`
       Type: `boolean`, Default: `false`
 
     *nvim-tree.log.truncate*

lua/nvim-tree/log.lua

@@ -71,7 +71,7 @@ end
 function M.setup(opts)
   M.config = opts.log
   if M.config and M.config.enable and M.config.types then
-    M.path = string.format("%s/nvim-tree.log", vim.fn.stdpath "cache", os.date "%H:%M:%S", vim.env.USER)
+    M.path = string.format("%s/nvim-tree.log", vim.fn.stdpath "log", os.date "%H:%M:%S", vim.env.USER)
     if M.config.truncate then
       os.remove(M.path)
     end