Update GitHub Actions workflows. (#4312)

This PR was automatically generated by the
update-workflows-single-bridged-provider workflow in the pulumi/ci-mgmt
repo, from commit 2d9cb9ebea04c3061453e60961ff347146fbdc26.

Author: pulumi-bot

Diff for: .github/workflows/publish.yml

@@ -119,7 +119,7 @@ jobs:
       with:
         tools: pulumictl, pulumicli, go, node, dotnet, python, java
     - name: Publish SDKs
-      uses: pulumi/[email protected].19
+      uses: pulumi/[email protected].20
       with:
         sdk: all
         version: ${{ inputs.version }}