Revert "Skip benchmarking CI on forks (#688)" (#689)

This reverts commit 83cea9e.

Author: vchuravy

.github/workflows/benchmark_pr.yml

@@ -1,7 +1,7 @@
 name: Benchmark a pull request
 
 on:
-  pull_request_target:
+  pull_request:
 
 permissions:
   pull-requests: write