[ci] idk whta that does but it's sus

Signed-off-by: Oriol Muñoz <oriol.munoz@digitalasset.com>

Author: OriolMunoz-da

.github/workflows/performance_tests.yml

@@ -4,7 +4,7 @@ on: # TODO: replace with main only, once a day
     types: [ opened, synchronize, reopened ]
 
 concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
+  group: ${{ github.workflow }}-${{ github.ref }}-perftest
   cancel-in-progress: true
 
 permissions: