Update GitHub Actions workflows. (#716)

This PR was automatically generated by the
update-workflows-ecosystem-providers workflow in the pulumi/ci-mgmt
repo, from commit 02f02bb0bfe879d167ed8f335b4950208454bafb.

---------

Co-authored-by: Pulumi Bot <bot@pulumi.com>
Co-authored-by: Bryce Lampe <bryce@pulumi.com>

.github/workflows/pull-request.yml

@@ -10,7 +10,7 @@ jobs:
     name: comment-on-pr
     steps:
     - name: Checkout Repo
-      uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+      uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
       with:
         lfs: true
     - name: Comment PR