Update package.json keywords to match CHANGELOG

Co-authored-by: bobrocke <2962426+bobrocke@users.noreply.github.com>

Author: Copilot

package.json

@@ -5,7 +5,9 @@
   "main": "bindings/node",
   "keywords": [
     "parser",
-    "json"
+    "vento",
+    "template",
+    "tree-sitter"
   ],
   "author": "Matthew Taylor",
   "license": "MIT",