PowerRename ignores greek letter "ς" (final sigma) in formatting, when changing beween lower and upper case

[Xenos71]

Microsoft PowerToys version

0.83.0

Installation method

Microsoft Store

Running as admin

Yes

Area(s) with issue?

PowerRename

Steps to reproduce

Create a simple .txt file (or use any kind of file you like) and rename it to "Δοκιμαστικός" (without the quotes).
Use PowerRename to change the file name to UPPERCASE.

PowerToysReport_2024-08-27-17-37-57.zip

✔️ Expected Behavior

After changing to uppercase, the file name should be: ΔΟΚΙΜΑΣΤΙΚΟΣ.txt

The letter "ς" (final sigma) is the same as "σ", but it is used only when it is the last letter of a word. So, it should be changed to "Σ".
Also, when changing to lowercase, if "Σ" is the last letter of a word (ONLY then), it should be changed to "ς", not "σ".

❌ Actual Behavior

Instead it changes to: ΔΟΚΙΜΑΣΤΙΚΌς.txt

"σ" is correctly changed to "Σ", but unfortunatelly "ς" remains the same.

Also, when "Σ" is the last letter of a word, after changing to lowercase it becomes "σ", which is wrong.
Since it is the last letter, it should become "ς" (final sigma).

Other Software

No response