DeepL translation works

whisper/whisperx/src/main/java/com/github/gtache/autosubtitle/subtitle/parser/json/whisperx/JSONSubtitleConverter.java

@@ -133,7 +133,7 @@ public class JSONSubtitleConverter implements SubtitleConverter<SubtitleImpl> {
             if (newLength > maxLineLength * maxLines) {
                 final var newSubtitle = new SubtitleImpl(builder.toString(), currentStart, currentEnd, null, null);
                 ret.add(newSubtitle);
-                builder.delete(0, builder.length());
+                builder.setLength(0);
                 builder.append(text);
                 currentStart = start == 0 ? currentEnd : start;
             } else if (areDifferentLines(builder.length(), newLength, maxLineLength)) {