[DOCS] Added 6.1.2 Watcher release notes (elastic/x-pack-elasticsearch#3547)
[DOCS] Added 6.1.2 Watcher release notes (elastic/x-pack-elasticsearch#3547)

Original commit: elastic/x-pack-elasticsearch@618dfed91a4d741517ed4aa235b9410c21a95230

strapdata/elassandra,vroyer/elassandra,strapdata/elassandra,strapdata/elassandra,strapdata/elassandra,vroyer/elassandra,strapdata/elassandra,vroyer/elassandra