Update demo.yml

.github/workflows/demo.yml

@@ -31,16 +31,14 @@ jobs:
           aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
           aws-region: us-east-2
           
-      - name: Get old instance and snapshot name
+      - name: Get old instance and snapshot name, create new instance name
         run: | 
           echo "OLD_INSTANCE_SNAPSHOT_NAME=$(aws lightsail get-instance-snapshots | grep '"name": "CasaOS-Demo-Snapshot-[0-9]' | sed 's/ //g' | sed 's/"//g' | sed 's/,//g' | sed 's/name://g')" >> $GITHUB_ENV
-          echo "OLD_INSTANCE_SNAPSHOT_NAME=${{ env.OLD_INSTANCE_SNAPSHOT_NAME }}
           echo "OLD_INSTANCE_NAME=$(aws lightsail get-instances | grep '"name": "CasaOS-Demo-[0-9]' | sed 's/ //g' | sed 's/"//g' | sed 's/,//g' | sed 's/name://g')" >> $GITHUB_ENV
-          echo "OLD_INSTANCE_NAME=${{ env.OLD_INSTANCE_NAME }}
-          
+          echo "NEW_INSTANCE_NAME=CasaOS-Demo-$(date +%s)" >> $GITHUB_ENV
+      
       - name: Create instances from snapshot
         run: | 
-          echo "NEW_INSTANCE_NAME=CasaOS-Demo-$(date +%s)" >> $GITHUB_ENV
           aws lightsail create-instances-from-snapshot \
               --instance-snapshot-name ${{ env.OLD_INSTANCE_SNAPSHOT_NAME }} \
               --instance-names ${{ env.NEW_INSTANCE_NAME }} \