use GITHUB_OUTPUT

Author: jazzsequence

.github/workflows/deploy.yml

@@ -15,14 +15,14 @@ jobs:
         id: check
         run: |
           if [ "${{ github.repository }}" = "jazzsequence/profile.github.io" ]; then
-            echo "should_deploy=false" >> $GITHUB_ENV
+            echo "should_deploy=false" >> $GITHUB_OUTPUT
             echo "Actions running on parent repository. Deploy to GitHub pages will be skipped."
           else
-            echo "should_deploy=true" >> $GITHUB_ENV
+            echo "should_deploy=true" >> $GITHUB_OUTPUT
             echo "Actions running on forked repository. Deploying to GitHub is enabled."
           fi
         env:
-          GITHUB_OUTPUT: $GITHUB_ENV
+          GITHUB_OUTPUT: $GITHUB_OUTPUT
   deploy:
     runs-on: ubuntu-latest
     if: needs.precheck.outputs.should_deploy == 'true'