Replace Unicode box-drawing chars with ASCII in test comments

Agent-Logs-Url: https://github.com/microsoft/durabletask-java/sessions/ea332218-fd02-4338-8805-e40f0009eb55

Co-authored-by: bachuv <15795068+bachuv@users.noreply.github.com>

Author: Copilot

client/src/test/java/com/microsoft/durabletask/StatusRuntimeExceptionHelperTest.java

@@ -18,7 +18,7 @@
  */
 public class StatusRuntimeExceptionHelperTest {
 
-    // ── toRuntimeException tests ──
+    // -- toRuntimeException tests --
 
     @Test
     void toRuntimeException_cancelledStatus_returnsCancellationException() {
@@ -173,7 +173,7 @@ void toRuntimeException_nullDescription_usesDefaultFallback() {
                 "Message should not contain literal ': null': " + result.getMessage());
     }
 
-    // ── toException tests ──
+    // -- toException tests --
 
     @Test
     void toException_deadlineExceededStatus_returnsTimeoutException() {