Manually fix translations with incorrect number of placeholders

Those polish translations were not using the same number of `%n$s` placeholders than the ones in the originals, which would create inconsistencies or crashes at runtime in that locale.

This inconsistency has thankfully been caught by `lintWordpressVanillaRelease` allowing me to correct them (locally by editing the files directly, to be able to move forward with the submission).

I've also asked someone from Team Global to reject those problematic strings at their root in GlotPress

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

@@ -988,7 +988,7 @@ Language: pl
     <string name="gutenberg_native_double_tap_to_go_to_color_settings">Stuknij dwukrotnie, by przejść do ustawień kolorów</string>
     <string name="reader_empty_followed_blogs_description">Gdy zaczniesz śledzić inne witryny, zobaczysz tutaj ich treść</string>
     <string name="feature_announcement_find_out_mode">Dowiedz się więcej</string>
-    <string name="feature_announcement_dialog_label">Co nowego w WordPressie</string>
+    <string name="feature_announcement_dialog_label">Co nowego w %s</string>
     <string name="insert_label_with_count">Wstaw %d</string>
     <string name="crop">przytnij</string>
     <string name="photo_picker_video_title">Wybierz wideo</string>
@@ -1315,7 +1315,6 @@ Language: pl
     <string name="notification_post_will_be_published_in_ten_minutes">\"%s\" zostanie opublikowany za 10 minut</string>
     <string name="navigate_back_desc">Wróć</string>
     <string name="web_preview_desktop">Komputer stacjonarny</string>
-    <string name="calendar_scheduled_post_description">Wpis „%1$s” został zaplanowany do publikacji w dniu „%2$s” w twojej aplikacji WordPressowej\n%3$s</string>
     <string name="notification_post_will_be_published_in_one_hour">\"%s\" zostanie opublikowany za godzinę</string>
     <string name="notification_post_has_been_published">\"%s\" został opublikowany</string>
     <string name="notification_scheduled_post_ten_minute_reminder">Zaplanowany wpis: przypomnienie 10 minutowe</string>