Remove dangling @main from GH action

Author: mimischi

.github/workflows/main.yml

@@ -19,7 +19,7 @@ jobs:
 
   benchmarks:
     name: Benchmarks
-    uses: ./.github/workflows/benchmarks.yml@main
+    uses: ./.github/workflows/benchmarks.yml
     with:
       benchmark_package_path: "Benchmarks"