Forgot some awaits on try_stream (#196)

Co-authored-by: Nenad <[email protected]>

Author: LeoPatOZ

src/block_range_scanner.rs

@@ -533,7 +533,7 @@ impl<N: Network> Service<N> {
                 }
                 Err(e) => {
                     error!(error = %e, "Terminal RPC call error, shutting down");
-                    _ = sender.try_stream(e);
+                    _ = sender.try_stream(e).await;
                     return;
                 }
             };
@@ -555,7 +555,7 @@ impl<N: Network> Service<N> {
                     }
                     Err(e) => {
                         error!(error = %e, "Terminal RPC call error, shutting down");
-                        _ = sender.try_stream(e);
+                        _ = sender.try_stream(e).await;
                         return;
                     }
                 };