[actions] update action versions to use node 20

.github/workflows/rebase.yml

@@ -12,12 +12,12 @@ jobs:
 
     steps:
     - name: Harden Runner
-      uses: step-security/harden-runner@v1
+      uses: step-security/harden-runner@v2
       with:
         allowed-endpoints:
           api.github.com:443
           github.com:443
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ljharb/rebase@master
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}