Update the usage of set-output command in GH actions (#82)

Author: vasireddy99

.github/workflows/plan-examples.yml

@@ -30,7 +30,7 @@ jobs:
         id: dirs
         run: |
           DIRS=$(python3 .github/workflows/plan-examples.py)
-          echo "::set-output name=directories::$DIRS"
+          echo "directories=$DIRS" >> $GITHUB_OUTPUT
 
   plan:
     name: Plan examples