Fixed nightly workflow

Author: Spacehuhn

.github/workflows/nightly.yml

@@ -10,11 +10,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Build message title
-        run: echo ::set-env name=TITLE::Deauther V2.5 $(echo ${{ github.sha }} | cut -c -7)
+        id: notif
+        run: echo ::set-output name=TITLE::Deauther V2 $(echo ${{ github.sha }} | cut -c -7)
 
       - name: Send message
         run: |
           curl -X POST https://api.github.com/repos/spacehuhntech/nightly-deauther/dispatches \
           -H 'Accept: application/vnd.github.everest-preview+json' \
           -u ${{ secrets.ACCESS_TOKEN }} \
-          --data '{"event_type": "${{ env.TITLE }}", "client_payload": {}}'
+          --data '{"event_type": "${{ steps.notif.outputs.TITLE }}", "client_payload": {}}'