Fix Czech confirm_remove_site translation breaking release lint

The 26.8 translation sync introduced a doubled backslash (\\") in the
Czech confirm_remove_site string. Android reads \\ as an escaped literal
backslash, which hides the %s placeholder from lint, so StringFormatMatches
fails: ChooseSiteActivity supplies 1 argument but the string is seen as
requiring 0.

Use a single-backslash escape (\") to match the English source and every
other locale.

Author: jkmassel

WordPress/src/main/res/values-cs/strings.xml

@@ -210,7 +210,7 @@ Language: cs_CZ
     <string name="site_settings_tags_empty_subtitle">Proč jej nevytvořit, aby bylo snazší označovat příspěvky štítky?</string>
     <string name="posts_published_empty_subtitle">Proč jej nevytvořit?</string>
     <string name="media_empty_list_subtitle">Proč něco nenahrát?</string>
-    <string name="confirm_remove_site">Odebrat \\"%s\\" z aplikace?</string>
+    <string name="confirm_remove_site">Odebrat \"%s\" z aplikace?</string>
     <string name="he_support_forbidden_error">Omlouváme se, tuto akci nemáte povoleno provést.</string>
     <string name="he_support_generic_error">Došlo k chybě. Zkuste to prosím později.</string>
     <string name="he_support_send_ticket_button">Odeslat</string>