Fix duplicated localisation key in DeleteConfiormationContentStrings

Noticed via `osu-resources` build warnings.

There are also a few other warnings about
ppy#27472. Seems something in crowdin
innards may still be exporting those strings even though they have been
fixed already. Not sure how to address that.

Probably need these to be detected via static analysis at this point
since it's happened again. Might look into the feasibility of making
that happen.

osu.Game/Localisation/DeleteConfirmationContentStrings.cs

@@ -32,7 +32,7 @@ public static class DeleteConfirmationContentStrings
         /// <summary>
         /// "Are you sure you want to delete all scores? This cannot be undone!"
         /// </summary>
-        public static LocalisableString Scores => new TranslatableString(getKey(@"collections"), @"Are you sure you want to delete all scores? This cannot be undone!");
+        public static LocalisableString Scores => new TranslatableString(getKey(@"scores"), @"Are you sure you want to delete all scores? This cannot be undone!");
 
         /// <summary>
         /// "Are you sure you want to delete all mod presets?"