#9: replaced deprecated ::set-output name

https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

.github/workflows/android_ci.yml

@@ -21,7 +21,8 @@ jobs:
           echo "Do perform instrumented tests"
           pr_exists_or_main_branch=1
         fi
-        echo "::set-output name=pr_exists_or_main_branch::$pr_exists_or_main_branch"
+        echo "{pr_exists_or_main_branch}={$pr_exists_or_main_branch}"
+        echo "{pr_exists_or_main_branch}={$pr_exists_or_main_branch}" >> $GITHUB_OUTPUT
 
     - name: checkout source
       uses: actions/checkout@v4