fix: Update to MorphoCloud/MorphoCloudWorkflow@b23226c

List of MorphoCloudWorkflow changes:

```
$ git shortlog 057c707..b23226c --no-merges
Jean-Christophe Fillion-Robin (1):
      fix(create-instance): Ensure installed files are moved into attached volume
```

See MorphoCloud/MorphoCloudWorkflow@057c707...b23226c

.github/workflows/create-instance.yml

@@ -376,6 +376,30 @@ jobs:
           attach_volume: ⏳
           send_email: ""
 
+      - name: Rename MyData directory to MyData-tmp
+        id: rename_mydata
+        run: |
+          ssh \
+            -o StrictHostKeyChecking=no \
+            -o UserKnownHostsFile=/dev/null \
+            -o LogLevel=ERROR \
+            exouser@$INSTANCE_IP \
+            'mv /media/volume/MyData /media/volume/MyData-tmp'
+        env:
+          INSTANCE_IP: ${{ steps.ip_create.outputs.floating_ip_address }}
+
+      - name: comment (failed to rename MyData)
+        if: ${{ steps.rename_mydata.outcome == 'failure' && failure() }}
+        uses: peter-evans/[email protected]
+        with:
+          issue-number: ${{ github.event.issue.number }}
+          body: |
+            ### Instance Creation Results ❌
+
+            Failed to rename `/media/volume/MyData` to `/media/volume/MyData-tmp` for instance **${{ steps.define.outputs.instance_name }}**.
+
+            See details at https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}
+
       - name: Attach Volume
         id: attach_volume
         run: |
@@ -419,6 +443,30 @@ jobs:
 
             See details at https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}
 
+      - name: Copy installed files into attached volume
+        id: copy_installed_files
+        run: |
+          ssh \
+            -o StrictHostKeyChecking=no \
+            -o UserKnownHostsFile=/dev/null \
+            -o LogLevel=ERROR \
+            exouser@$INSTANCE_IP \
+            'mv /media/volume/MyData-tmp/Slicer /media/volume/MyData/Slicer && mv /media/volume/MyData-tmp/dist /media/volume/MyData/dist'
+        env:
+          INSTANCE_IP: ${{ steps.ip_create.outputs.floating_ip_address }}
+
+      - name: comment (failed to copy installed files from MyData-tmp to MyData)
+        if: ${{ steps.copy_installed_files.outcome == 'failure' && failure() }}
+        uses: peter-evans/[email protected]
+        with:
+          issue-number: ${{ github.event.issue.number }}
+          body: |
+            ### Instance Creation Results ❌
+
+            Failed to copy installed files from `/media/volume/MyData-tmp` to `/media/volume/MyData` for instance **${{ steps.define.outputs.instance_name }}**.
+
+            See details at https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}
+
       - name: Update Request Status Label
         id: update-request-status-label
         uses: ./.github/actions/update-request-status-label