fix: off by one unwind range (#2960)

bin/reth/src/stage/unwind.rs

@@ -109,7 +109,7 @@ impl Subcommands {
                     .ok_or_else(|| eyre::eyre!("Block hash not found in database: {hash:?}"))?,
                 BlockHashOrNumber::Number(num) => *num,
             },
-            Subcommands::NumBlocks { amount } => last.0.saturating_sub(*amount),
+            Subcommands::NumBlocks { amount } => last.0.saturating_sub(*amount) + 1,
         };
         Ok(target..=last.0)
     }