change the supported stack versions for ECK (#709)

Update supported stack version in the doc

Author: kvalliyurnatt

deploy-manage/deploy/cloud-on-k8s.md

@@ -80,11 +80,11 @@ Alpha, beta, and stable API versions follow the same [conventions used by Kubern
 
 ECK is compatible with the following Elastic Stack applications:
 
-* Elasticsearch, Kibana, APM Server: 6.8+, 7.1+, 8+
-* Enterprise Search: 7.7+, 8+
-* Beats: 7.0+, 8+
-* Elastic Agent: 7.10+ (standalone), 7.14+ (Fleet), 8+
-* Elastic Maps Server: 7.11+, 8+
+* Elasticsearch, Kibana, APM Server: 7.17+, 8+
+* Enterprise Search: 7.17+, 8+
+* Beats: 7.17+, 8+
+* Elastic Agent: 7.10+ (standalone), 7.17+ (Fleet), 8+
+* Elastic Maps Server: 7.17+, 8+
 * Logstash: 8.7+
 
 Elastic Stack application images for the OpenShift-certified Elasticsearch (ECK) Operator are only available from version 7.10 and later.