Bump version (#1253)

Co-authored-by: ci.datadog-api-spec <packages@datadoghq.com>

Author: api-clients-generation-pipeline[bot]

package.json

@@ -104,5 +104,5 @@
   "engines": {
     "node": ">=12.0.0"
   },
-  "version": "1.15.0"
+  "version": "1.15.1-beta.0"
 }