Update release-notes.md (#1053)
Update release-notes.md (#1053)

* Update release-notes.md

* event is observed was cut off

* Update content/sensu-go/5.1/release-notes.md

Co-Authored-By: Blue0ctober <9e3230fdeb6c7cab0154356bc0e7294ccbea2831@sensu.io>

sensu/sensu-docs,sensu/sensu-docs,sensu/sensu-docs,sensu/sensu-docs,sensu/sensu-docs