[Sync EN] Fix grammar in strings functions

[github-actions]

PR: https://github.com/php/doc-en/pull/5726 (2026-07-31)

Файлы RU для обновления

• reference/strings/functions/crypt.xml
• reference/strings/functions/get-html-translation-table.xml
• reference/strings/functions/localeconv.xml
• reference/strings/functions/ltrim.xml
• reference/strings/functions/quoted-printable-decode.xml
• reference/strings/functions/setlocale.xml
• reference/strings/functions/str-repeat.xml
• reference/strings/functions/stripos.xml
• reference/strings/functions/strncasecmp.xml
• reference/strings/functions/strpbrk.xml
• reference/strings/functions/strripos.xml