fix telemetry test

Author: ChrisHegarty

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/esql/60_usage.yml

@@ -139,7 +139,7 @@ setup:
   - do: {xpack.usage: {}}
   - match: { esql.available: true }
   - match: { esql.enabled: true }
-  - length: { esql.features: 25 }
+  - length: { esql.features: 26 }
   - set: {esql.features.dissect: dissect_counter}
   - set: {esql.features.drop: drop_counter}
   - set: {esql.features.eval: eval_counter}
@@ -165,6 +165,7 @@ setup:
   - set: {esql.features.fork: fork_counter}
   - set: {esql.features.rrf: rrf_counter}
   - set: {esql.features.completion: completion_counter}
+  - set: {esql.features.sample: sample_counter}
   - length: { esql.queries: 3 }
   - set: {esql.queries.rest.total: rest_total_counter}
   - set: {esql.queries.rest.failed: rest_failed_counter}
@@ -220,7 +221,7 @@ setup:
   - gt: {esql.functions.to_long: $functions_to_long}
   - match: {esql.functions.coalesce: $functions_coalesce}
   - gt: {esql.functions.categorize: $functions_categorize}
-  - length: {esql.functions: 131} # check the "sister" test above for a likely update to the same esql.functions length check
+  - length: {esql.functions: 132} # check the "sister" test above for a likely update to the same esql.functions length check
 
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 took: