Upgrade GitHub Actions to latest versions (#280)

Signed-off-by: Salman Muin Kayser Chishti <13schishti@gmail.com>

.github/workflows/update-readme.yml

@@ -23,7 +23,7 @@ jobs:
         run: |
           pip install -r src/requirements.txt
       - id: "auth"
-        uses: "google-github-actions/auth@v2"
+        uses: "google-github-actions/auth@v3"
         with:
           workload_identity_provider: "projects/576328904266/locations/global/workloadIdentityPools/github/providers/cheahjs-org"
           project_id: ${{ secrets.GCP_PROJECT }}
@@ -45,7 +45,7 @@ jobs:
         run: |
           rm ${{ steps.auth.outputs.credentials_file_path }}
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v7
+        uses: peter-evans/create-pull-request@v8
         with:
           title: "Update README with latest models"
           body: "This PR updates the README with the latest available models."