Use newer educates CLI version which changed command line option name.

.github/workflows/publish-workshops.yaml

@@ -23,9 +23,9 @@ jobs:
     - name: Install Educates CLI
       shell: bash
       run: |
-        # curl -Lo /usr/local/bin/educates https://github.com/vmware-tanzu-labs/educates-training-platform/releases/download/2.6.0-alpha.25/educates-linux-amd64
+        # curl -Lo /usr/local/bin/educates https://github.com/vmware-tanzu-labs/educates-training-platform/releases/download/2.6.0-alpha.26/educates-linux-amd64
         # chmod +x /usr/local/bin/educates
-        imgpkg pull -i ghcr.io/vmware-tanzu-labs/educates-client-programs:2.6.0-alpha.25 -o /tmp/client-programs
+        imgpkg pull -i ghcr.io/vmware-tanzu-labs/educates-client-programs:2.6.0-alpha.26 -o /tmp/client-programs
         mv /tmp/client-programs/educates-linux-amd64 /usr/local/bin/educates
 
     - name: Setup repository variables and release details
@@ -42,7 +42,7 @@ jobs:
           mkdir -p ${{runner.temp}}/${WORKSHOP_DIRECTORY}
           educates publish-workshop ${WORKSHOP_DIRECTORY} \
             --export-workshop ${{runner.temp}}/${WORKSHOP_DIRECTORY}/workshop.yaml \
-            --repository=ghcr.io/${REPOSITORY_OWNER} \
+            --image-repository=ghcr.io/${REPOSITORY_OWNER} \
             --workshop-version=${REPOSITORY_TAG} \
             --registry-username=${{github.actor}} \
             --registry-password=${{secrets.GITHUB_TOKEN}}