docs: Neovim has syntax highlighting (#5203)

Author: vanillajonathan

CHANGELOG.md

@@ -19,6 +19,8 @@
 - Add syntax highlight file for GNU Emacs. (@vanillajonathan, #5189)
 - [Kakoune](https://kakoune.org/), a terminal-based text editor has syntax
   highlighting for PRQL. (@vanillajonathan)
+- [Neovim](https://neovim.io/) 0.11 has syntax highlighting for PRQL.
+  (@vanillajonathan)
 
 **Internal changes**:
 

grammars/README.md

@@ -75,5 +75,10 @@ an index.
   and helix. The grammar can be found at
   [https://github.com/PRQL/tree-sitter-prql](https://github.com/PRQL/tree-sitter-prql).
 
-- [vim](https://www.vim.org/) — used by terminal-based text editor Vim. File is
-  at [`grammars/vim/`](https://github.com/PRQL/prql/tree/main/grammars/vim/).
+- [vim](https://www.vim.org/) — used by terminal-based text editor Vim.
+  Instructions at
+  [`grammars/vim/`](https://github.com/PRQL/prql/tree/main/grammars/vim/). The
+  grammar is
+  [upstream](https://github.com/vim/vim/blob/master/runtime/syntax/prql.vim).
+
+  - [Neovim](https://neovim.io/) supported. Grammar is upstream.