fixed deprecated warning in treesitter

lua/plugins/treesitter.lua

@@ -44,8 +44,7 @@ return {
         },
       },
     })
-    local parser = require('nvim-treesitter.parsers').filetype_to_parsername
-    parser.groovy = 'java' -- the someft filetype will use the python parser and queries.
+    vim.treesitter.language.register('groovy', 'java')
     require('nvim-treesitter.install').prefer_git = true
   end
 }