give access to github action to comment on pull request

Author: JacobBarthelmeh

.github/workflows/sftp-benchmark.yml

@@ -6,6 +6,12 @@ on:
   pull_request:
     branches: [ '*' ]
 
+# give permissions to write a comment on the pull request and to read artifacts
+permissions:
+  pull-requests: write
+  actions: read
+  contents: read
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true