README: fix typo extension->extensions

Author: Maltimore

README.md

@@ -113,17 +113,17 @@ require('telescope').setup({
 For a particular command you can pass it directly in your key mapping to the function:
 
 ```lua
-require('telescope').extension.orgmode.search_headings({ max_depth = 3 })
+require('telescope').extensions.orgmode.search_headings({ max_depth = 3 })
 ```
 
 You can also create a key mapping, that allows you to search directly for org files:
 
 ```lua
 vim.set.keymap(
   "n",
-  "<Leader>off", 
+  "<Leader>off",
   function()
-    require('telescope').extension.orgmode.search_headings({ mode = "orgfiles" })
+    require('telescope').extensions.orgmode.search_headings({ mode = "orgfiles" })
   end,
   { desc = "Find org files"}
 )