fix(lezer-promql): fix missing types export in package.json (#15161)

Signed-off-by: Jack Westbrook <jack.westbrook@gmail.com>

web/ui/module/lezer-promql/package.json

@@ -5,6 +5,7 @@
   "main": "dist/index.cjs",
   "type": "module",
   "exports": {
+    "types": "./dist/index.d.ts",
     "import": "./dist/index.es.js",
     "require": "./dist/index.cjs"
   },