[DOCS] Added elasticsearch_nodes to monitoring blacklist
Original commit: elastic/x-pack-elasticsearch@f85f7015365757944803afeadfe4219523e1c5a1
@@ -246,6 +246,7 @@ You can add any of the following watch identifiers to the blacklist:
* `elasticsearch_cluster_status`
* `elasticsearch_version_mismatch`
+* `elasticsearch_nodes`
* `kibana_version_mismatch`
* `logstash_version_mismatch`
* `xpack_license_expiration`
