Fix: HF-85 Russian DCOUNTA missing yo letter

Per Microsoft Excel Russian translations, DCOUNTA is БСЧЁТА (with Ё, not Е).
The pattern is consistent with COUNT (СЧЁТ), COUNTA (СЧЁТЗ), and DCOUNT
(БСЧЁТ) which all use Ё. The previous БСЧЕТА was a typo missing the
ё diacritical mark.

Cursor Bugbot finding (real bug, not historical re-flag — verified by
cross-referencing with COUNT/COUNTA/DCOUNT existing translations and
Microsoft Excel Russian docs convention).

Author: marcin-kordas-hoc

src/i18n/languages/ruRU.ts

@@ -77,7 +77,7 @@ const dictionary: RawTranslationPackage = {
     DB: 'ФУО',
     DAVERAGE: 'БДСРЕДНЕЕ',
     DCOUNT: 'БСЧЁТ',
-    DCOUNTA: 'БСЧЕТА',
+    DCOUNTA: 'БСЧЁТА',
     DGET: 'БИЗВЛЕЧЬ',
     DMAX: 'БДМАКС',
     DMIN: 'БДМИН',