fix rules in week table overrides

[cekk]

Adjust rules to get right week_table also if we try to book something next year

[coveralls]

Pull Request Test Coverage Report for Build 6825352532

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A quick fix for this PR: rebase it; your next report should be accurate.

• 12 of 12 (100.0%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+0.3%) to 72.978%

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Files with Coverage Reduction	New Missed Lines	%
src/redturtle/prenotazioni/content/prenotazioni_folder.py	1	82.72%

Totals
Change from base Build 6801156990:	0.3%
Covered Lines:	2906
Relevant Lines:	3982

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💛 - Coveralls