Cancel superseded PR benchmark runs

Signed-off-by: Ludvig Liljenberg <4257730+ludfjig@users.noreply.github.com>

Author: ludfjig

.github/workflows/benchmark.yml

@@ -12,7 +12,7 @@ permissions:
 
 concurrency:
   group: benchmark-${{ github.event.pull_request.number }}
-  cancel-in-progress: false
+  cancel-in-progress: true
 
 env:
   CARGO_TERM_COLOR: always