cicd: Fix syntax issue with setting date

.github/workflows/build-snapshot.yml

@@ -54,7 +54,7 @@ jobs:
 
       - name: get date
         run: |
-          DATE=$(date +'%Y-%m-%d')" >> "$GITHUB_ENV"
+          echo "DATE=$(date +'%Y-%m-%d')" >> "$GITHUB_ENV"
 
       - name: Archive binaries
         uses: actions/upload-artifact@v3.1.0