CI: Update gha-puppet branch v3->v4

We did this a long time ago for our testing pipeline, but forgot release
& prepare_release

Author: bastelfreak

moduleroot/.github/workflows/prepare_release.yml.erb

@@ -17,7 +17,7 @@ permissions:
 
 jobs:
   release_prep:
-    uses: 'voxpupuli/gha-puppet/.github/workflows/prepare_release.yml@v3'
+    uses: 'voxpupuli/gha-puppet/.github/workflows/prepare_release.yml@v4'
     with:
       version: ${{ github.event.inputs.version }}
 <%- unless @configs['with']&.has_key?('allowed_owner') -%>

moduleroot/.github/workflows/release.yml.erb

@@ -16,7 +16,7 @@ permissions:
 jobs:
   release:
     name: Release
-    uses: voxpupuli/gha-puppet/.github/workflows/release.yml@v3
+    uses: voxpupuli/gha-puppet/.github/workflows/release.yml@v4
     with:
 <%- if @configs['with'] -%>
 <%- @configs['with'].each do |k,v| -%>