ci: switch to job summary version

Author: MilesCranmer

.github/workflows/benchmark_pr.yml

@@ -1,16 +1,13 @@
 name: Benchmark PR
-
 on:
-  pull_request_target:
+  pull_request:
     branches: [ main ]
 
-permissions:
-  pull-requests: write    # needed to post comments
-
 jobs:
   bench:
     runs-on: ubuntu-latest
     steps:
       - uses: MilesCranmer/AirspeedVelocity.jl@action-v1
         with:
-          julia-version: '1'
+          julia-version: "1"
+          job-summary: "true"  # Post to "summary" tab of workflow run