fix github action env setup (#942)

Signed-off-by: Peixin Li <pxli@nyu.edu>

.github/workflows/blossom-ci.yml

@@ -76,17 +76,14 @@ jobs:
           java-version: 1.8
 
       - name: Get project data (maven)
-        run: |
-          echo ::set-env name=projects::$(mvn -am dependency:tree | grep maven-dependency-plugin | awk '{ out="com.nvidia:"$(NF-1);print out }' | grep rapids | xargs | sed -e 's/ /,/g')
+        run: echo "PROJECTS=$(mvn -am dependency:tree | grep maven-dependency-plugin | awk '{ out="com.nvidia:"$(NF-1);print out }' | grep rapids | xargs | sed -e 's/ /,/g')" >> $GITHUB_ENV
 
       - name: Add mask
         run: echo "::add-mask::${{ secrets.BLACKDUCK_URL }}"
 
       - name: Run synopsys detect
         id: scan_result
         uses: blackducksoftware/github-action@2.0.1
-        env:
-          PROJECTS: ${{ env.projects }}
         with:
           args: >
             --blackduck.url="https://${{ secrets.BLACKDUCK_URL }}"