Align applies_to tags for sample, change_point

Author: alex-spies

docs/reference/query-languages/esql/_snippets/commands/layout/change_point.md

@@ -4,12 +4,9 @@
 The `CHANGE_POINT` command requires a [platinum license](https://www.elastic.co/subscriptions).
 :::
 
-::::{warning}
-This functionality is in technical preview and may be
-changed or removed in a future release. Elastic will work to fix any
-issues, but features in technical preview are not subject to the support
-SLA of official GA features.
-::::
+```yaml {applies_to}
+stack: preview 9.1.0
+```
 
 `CHANGE_POINT` detects spikes, dips, and change points in a metric.
 

docs/reference/query-languages/esql/_snippets/commands/layout/sample.md

@@ -1,7 +1,7 @@
 ## `SAMPLE` [esql-sample]
 
 ```yaml {applies_to}
-stack: preview 9.1
+stack: preview 9.1.0
 ```
 
 The `SAMPLE` command samples a fraction of the table rows.