Finnish localisation incorrectly uses ss. instead of s. to denote a page range in a bibliography item

[SeSodesa]

I originally posted this in the typst/hayagriva GitHub repository (typst/hayagriva#161), but I now think this is the place I should mention the problem, which is what the title claims. Basically, according to the most recent instructions by the Finnish Center for Domestic Languages (link), page ranges in bibliography entries should be denoted with a simple s. instead of ss., regardless of the number of pages in the range:

Lähdeluetteloon merkitään yleensä artikkelien sivunumerot. Merkinnässä voi käyttää tai olla käyttämättä lyhennettä s.

This translates roughly to "Page numbers are usually marked into a bibliography item. The bibliography string preceding page ranges may include the string s., or be empty.". Generally, it is probably better to have a visible page range string instead of leaving it out and relying on text styles to separate the fields.

I am not 100 % sure, but a quick look at this repo suggests that this is the file one would need to modify to achieve the desired result:

locales/locales-fi-FI.xml

Lines 403 to 406 in e631a52

	<term name="page" form="short">
	<single>s.</single>
	<multiple>ss.</multiple>
	</term>

locales/locales-fi-FI.xml

Lines 421 to 424 in e631a52

	<term name="number-of-pages" form="short">
	<single>s.</single>
	<multiple>ss.</multiple>
	</term>

These should be changed to

<term name="page" form="short">
  <single>s.</single>
  <multiple>s.</multiple>
</term>

and

<term name="number-of-pages" form="short">
  <single>s.</single>
  <multiple>s.</multiple>
</term>

for the Finnish localisation to conform to the latest national guidelines.

[SeSodesa]

This should also be closed by #323.