fix: Fixed the description for "overlapping_frequency" and "timeframe_overlap" (#2084)

* Fixed the description for "overlapping_frequency" and "timeframe_overlap"

Author: qcdyx

main/src/main/java/org/mobilitydata/gtfsvalidator/validator/OverlappingFrequencyValidator.java

@@ -68,7 +68,8 @@ public void validate(NoticeContainer noticeContainer) {
    * Trip frequencies overlap.
    *
    * <p>Trip frequencies must not overlap in time. Two entries X and Y are considered to directly
-   * overlap if `X.start_time &lt;= Y.start_time` and `Y.start_time &lt; X.end_time`.
+   * overlap if X.start_time is less than or equal to Y.start_time and Y.start_time is less than
+   * X.end_time.
    */
   @GtfsValidationNotice(severity = ERROR, files = @FileRefs(GtfsFrequencySchema.class))
   static class OverlappingFrequencyNotice extends ValidationNotice {

main/src/main/java/org/mobilitydata/gtfsvalidator/validator/TimeframeOverlapValidator.java

@@ -78,8 +78,8 @@ static TimeframeKey create(GtfsTimeframe timeframe) {
    * overlapping time intervals.
    *
    * <p>Timeframes with the same group and service dates must not overlap in time. Two entries X and
-   * Y are considered to directly overlap if `X.start_time &lt;= Y.start_time` and `Y.start_time
-   * &lt; X.end_time`.
+   * Y are considered to directly overlap if X.start_time is less than or equal to Y.start_time and
+   * Y.start_time is less than X.end_time.
    */
   @GtfsValidationNotice(severity = ERROR, files = @FileRefs(GtfsFrequencySchema.class))
   static class TimeframeOverlapNotice extends ValidationNotice {