[lezer-promql] Fix package.json main to point to correct cjs module (#11888)

Signed-off-by: Shan Aminzadeh <shan.aminzadeh@chronosphere.io>

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

@@ -2,7 +2,7 @@
   "name": "@prometheus-io/lezer-promql",
   "version": "0.41.0-rc.0",
   "description": "lezer-based PromQL grammar",
-  "main": "index.cjs",
+  "main": "dist/index.cjs",
   "type": "module",
   "exports": {
     "import": "./dist/index.es.js",