fix: incorrect ISO week 53 conversion when only 52 weeks exist

[ShashwatAgrawal20]

• closes BUG: pandas to_datetime() returns incorrect isoweek conversion in week 53 when only 52 weeks exist #60885 (Replace xxxx with the GitHub issue number)
• Tests added and passed if fixing a bug or adding a new feature
• All code checks passed.
• Added type annotations to new arguments/methods/functions.
• Added an entry in the latest doc/source/whatsnew/vX.X.X.rst file if fixing a bug or adding a new feature.

[ShashwatAgrawal20]

Not sure if I'm supposed to be adding the tests in pandas/tests/tslibs/test_strptime.py or not.

[mroeschke]

Not sure if I'm supposed to be adding the tests in pandas/tests/tslibs/test_strptime.py or not.

You can add a test in test_to_datetime.py with the example from the original issue

[mroeschke]

Suggested change

	@pytest.mark.parametrize("errors", ["raise"])
	def test_invalid_iso_week_53(self, msg, s, _format, errors):
	# See GH#60885
	with pytest.raises(ValueError, match=msg):
	to_datetime(s, format=_format, errors=errors)
	def test_invalid_iso_week_53(self, msg, s, _format):
	# See GH#60885
	with pytest.raises(ValueError, match=msg):
	to_datetime(s, format=_format)

errors="raise" is the default so we don't need to specify it here

[mroeschke]

Thanks @ShashwatAgrawal20