fix(examples): realign immutables range with release-preprod environment

Author: turmelclem

examples/client-cardano-database-v2/src/main.rs

@@ -82,7 +82,7 @@ async fn main() -> MithrilResult<()> {
         .verify_chain(&cardano_database_snapshot.certificate_hash)
         .await?;
 
-    let immutable_file_range = ImmutableFileRange::From(15000);
+    let immutable_file_range = ImmutableFileRange::From(4000);
     let download_unpack_options = DownloadUnpackOptions {
         allow_override: true,
         include_ancillary: true,