Fix sentence-furigana template

[Kuuuube]

The output of sentence-furigana needs to not be escaped. With the new handlebars changes this requires using {{{ }}} syntax. https://handlebarsjs.com/guide/expressions.html#html-escaping

As far as I can tell this is the only handlebar with this issue but I haven't thoroughly tested every single one.

I also had to make a small change to the version 25 update or npm run "test:unit:options" test would fail due to one out of three profiles having profile.options.input set to undefined. (does anyone run this test when making changes?)

[codspeed-hq]

CodSpeed Performance Report

Merging #733 will improve performances by 47.13%

_{Comparing Kuuuube:sentence-furigana-fix (7f88b7f) with master (e47a0f4)}

Summary

⚡ 1 improvements
✅ 3 untouched benchmarks

Benchmarks breakdown

	Benchmark	master	Kuuuube:sentence-furigana-fix	Change
⚡	transformations (n=57)	54.7 ms	37.2 ms	+47.13%

[github-actions]

✔️ No visual differences introduced by this PR.

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[djahandarie]

I also had to make a small change to the version 25 update or npm run "test:unit:options" test would fail due to one out of three profiles having profile.options.input set to undefined. (does anyone run this test when making changes?)

@toasted-nutbread Should we add this to CI?