Fix issue with BYWEEKNO=1 where UNTIL lies in the year prior to the year of the week of the last occurrence.

[minichma]

In cases where BYWEEKNO=1 is specified, week no 1 may start in the year prior to the one it belongs to. If both, the last occurrence and UNTIL lie in the year prior to the year the corresponding week belongs to, UNTIL has not been handled correctly, which is fixed with this PR.

E.g. the following case is fixed, which was missing the last instance prior to the fix:

# BYWEEKNO 1 - UNTIL and the last recurrence are in 2024 while the week is 1 of 2025.
RRULE:FREQ=YEARLY;BYWEEKNO=1;BYDAY=MO;UNTIL=20241230
DTSTART:20240101
INSTANCES:20240101,20241230

fixes #751

[codecov]

Codecov Report

Attention: Patch coverage is 95.45455% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
Ical.Net/Evaluation/RecurrencePatternEvaluator.cs	95%	0 Missing and 1 partial ⚠️

❌ Your project status has failed because the head coverage (66%) is below the target coverage (80%). You can increase the head coverage or adjust the target coverage.

@@         Coverage Diff         @@
##           main   #752   +/-   ##
===================================
  Coverage    66%    66%           
===================================
  Files       104    104           
  Lines      4611   4617    +6     
  Branches   1146   1147    +1     
===================================
+ Hits       3047   3055    +8     
  Misses     1129   1129           
+ Partials    435    433    -2     

Files with missing lines	Coverage Δ
Ical.Net/Evaluation/RecurrencePatternEvaluator.cs	91% <95%> (+<1%)	⬆️

... and 2 files with indirect coverage changes

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[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[axunonb]

Another edge case fixed, very good

[axunonb]

👍