fix unmappable character for encoding US-ASCII

Signed-off-by: Yaliang Wu <ylwu@amazon.com>

ml-algorithms/src/main/java/org/opensearch/ml/engine/algorithms/regression/LogisticRegression.java

@@ -104,7 +104,7 @@ private void validateParameters() {
             throw new IllegalArgumentException("MiniBatchSize should not be negative.");
         }
 
-        // loggingInterval – Log the loss after this many iterations. If -1 don't log anything.
+        // loggingInterval: Log the loss after this many iterations. If -1 don't log anything.
         if (parameters.getLoggingInterval() != null && parameters.getLoggingInterval() < -1) {
             throw new IllegalArgumentException("Invalid Logging intervals");
         }

plugin/src/main/java/org/opensearch/ml/model/MLModelAutoReloader.java

@@ -72,7 +72,7 @@ public class MLModelAutoReloader {
     private volatile Integer autoReloadMaxRetryTimes;
 
     /**
-     * constructor method， init all the params necessary for model auto reloading
+     * constructor method, init all the params necessary for model auto reloading
      *
      * @param clusterService   clusterService
      * @param threadPool       threadPool