fixup - wider error margin

Author: pabloem

x-pack/plugin/esql/src/internalClusterTest/java/org/elasticsearch/xpack/esql/action/TimeSeriesRateIT.java

@@ -40,9 +40,11 @@ record Doc(String host, String cluster, long timestamp, int requestCount, double
     final Map<String, Integer> hostToRate = new HashMap<>();
     final Map<String, Integer> hostToCpu = new HashMap<>();
 
-    static final float DEVIATION_LIMIT = 0.2f;
-    static final float SUBGROUP_DEVIATION_LIMIT = 0.30f; // extra deviation tolerance for subgroups due to fewer samples
-    // We expect a 10% drop in the rate due to not covering window edges and not triggering
+    static final float DEVIATION_LIMIT = 0.25f;
+    // extra deviation tolerance for subgroups due to fewer samples
+    // at 0.35 deviation limit, we see 2/8000 failures. I am expanding to 0.37
+    static final float SUBGROUP_DEVIATION_LIMIT = 0.37f;
+    // We expect a drop in the rate due to not covering window edges and not triggering
     // extrapolation logic in the time series engine.
     static final float EXPECTED_DROP_RATE = 0.15f;
     static final int LIMIT = 5;