addressed comments

Signed-off-by: Atharva Sharma <[email protected]>

src/main/java/org/opensearch/performanceanalyzer/collectors/telemetry/RTFHeapMetricsCollector.java

@@ -130,7 +130,7 @@ private void recordMetrics() {
                     memoryUsage.getUsed(),
                     Tags.create().addTag(memTypeAttributeKey, entry.getKey()));
             heapMaxTag = Tags.create().addTag(memTypeAttributeKey, entry.getKey());
-            heapMaxValue = memoryUsage.getUsed();
+            heapMaxValue = memoryUsage.getMax();
         }
     }
 }