Wrong specificity

Hello,

I got wrong specificity on this selector `.form-floating > .form-control:focus ~ label::after`, with https://specificity.keegan.st/ I see 032 whereas with your tool 022

Script to reproduce :

```python
from cssutils import CSSParser

parser = CSSParser(parseComments=False, validate=None)
allrules = parser.parseString(
".form-floating > .form-control:focus ~ label::after{color:red}"
)
for el in allrules:
print(el.selectorList[0].specificity) # (0, 0, 2, 2)
```

Thanks

Run the provided CSSParser.parseString reproduction first, then trace how selectorList[0].specificity is calculated for the shown selector. Compare the result with the expected specificity from the linked calculator; done means the reported specificity is corrected and the reproduction no longer shows the discrepancy.

Written by the indexing model from the issue text.