nvim-surround: fix typo in description (#631)

Removed extra 'e' from the word upstream in description

Co-authored-by: raf <raf@notashelf.dev>

Author: harmanhobbit

modules/plugins/utility/surround/surround.nix

@@ -38,7 +38,7 @@ in {
       default = false;
       description = ''
         nvim-surround: add/change/delete surrounding delimiter pairs with ease.
-        Note that the default mappings deviate from upstreeam to avoid conflicts
+        Note that the default mappings deviate from upstream to avoid conflicts
         with nvim-leap.
       '';
     };