tools.md in rbs-3.4.0.pre.1

- old
+ new

@@ -12,5 +12,6 @@
 * Emacs: [rbs-mode](https://github.com/ybiquitous/rbs-mode)
 * RubyMine: [It supports RBS by default](https://www.jetbrains.com/help/ruby/rbs.html)
 * Sublime Text: [sublime-rbs-plugin](https://github.com/soutaro/sublime-rbs-plugin)
 * Vim: [rbs.vim](https://github.com/pocke/rbs.vim)
 * Visual Studio Code: [vscode-rbs-syntax](https://github.com/soutaro/vscode-rbs-syntax)
+* NeoVim: [tree-sitter-rbs](https://github.com/joker1007/tree-sitter-rbs)