Update GitHub Actions workflows. (#720)

This PR was automatically generated by the
update-workflows-ecosystem-providers workflow in the pulumi/ci-mgmt
repo, from commit f8936f4a8e62034ca3d14b03bd6bd52a47a437c8.

Author: pulumi-bot

.github/actions/setup-tools/action.yml

@@ -72,7 +72,7 @@ runs:
 
     - name: Setup Python
       if: inputs.tools == 'all' || contains(inputs.tools, 'python')
-      uses: actions/setup-python@8d9ed9ac5c53483de85588cdf95a591a75ab9f55 # v5.5.0
+      uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
       with:
         python-version: 3.11.8