nixpkgs/neovim: fix vimdoc treesitter

.config/nixpkgs/neovim/treesitter/grammars.json

@@ -63,5 +63,10 @@
   "jsdoc": {
     "rev": "d01984de49927c979b46ea5c01b78c8ddd79baf9",
     "sha256": "11w3a6jfvf8fq1jg90bsnhj89gvx32kv1gy4gb5y32spx6h87f1v"
+  },
+  "vimdoc": {
+    "repo": "neovim/tree-sitter-vimdoc",
+    "rev": "4f8ba9e39c8b3fbaf0bb5f70ac255474a9099359",
+    "sha256": "1jpmw4k8as6hq5wd6133kan4zvwchsb7g5v9ajsxba7zyggg682r"
   }
 }