Fix for nvim-treesitter integration:

- Change name 'CMake' to 'cmake'
- Regenerate from grammar

grammar.js

@@ -1,5 +1,5 @@
 module.exports = grammar({
-  name: 'CMake',
+  name: 'cmake',
 
   rules: {
     source_file: $ => repeat($.command_invocation),

src/grammar.json

@@ -1,5 +1,5 @@
 {
-  "name": "CMake",
+  "name": "cmake",
   "rules": {
     "source_file": {
       "type": "REPEAT",

src/parser.c

@@ -2204,7 +2204,7 @@ extern "C" {
 #define extern __declspec(dllexport)
 #endif
 
-extern const TSLanguage *tree_sitter_CMake(void) {
+extern const TSLanguage *tree_sitter_cmake(void) {
   static const TSLanguage language = {
     .version = LANGUAGE_VERSION,
     .symbol_count = SYMBOL_COUNT,