Merge #1972

1972: Fix nightly shelley latency benchmark r=rvl a=rvl

### Issue Number

None

### Overview

Fixes the shelley latency benchmark in buildkite nightly. It was saying:

```
latency: ProcessDidNotStart "cardano-node" cardano-node: createProcess: runInteractiveProcess: exec: does not exist (No such file or directory)
```


Co-authored-by: Rodney Lorrimar <rodney.lorrimar@iohk.io>

Author: iohk-bors[bot]

nix/haskell.nix

@@ -133,8 +133,9 @@ let
 
         # Add jormungandr to the PATH of the latency benchmark
         packages.cardano-wallet-jormungandr.components.benchmarks.latency = wrapBench jmPkgs.jormungandr;
-        # Add cardano-node to the PATH of the byron latency benchmark
+        # Add cardano-node to the PATH of the byron and shelley latency benchmarks
         packages.cardano-wallet-byron.components.benchmarks.latency = wrapBench pkgs.cardano-node;
+        packages.cardano-wallet-shelley.components.benchmarks.latency = wrapBench pkgs.cardano-node;
 
         # Add cardano-node to the PATH of the byroon restore benchmark.
         # cardano-node will want to write logs to a subdirectory of the working directory.