feat: use GITHUB_OUTPUT instead

Author: shenxianpeng

main.py

@@ -168,8 +168,9 @@ def add_pr_comments() -> int:
             print(f"Creating a new comment on PR #{pr_number}.")
             pull_request.create_comment(body=pr_comments)
 
-        # output pr_comments to GitHub Actions
-        print(f"::set-output name=pr_comments::{pr_comments}")
+        # output pr_comments to $GITHUB_OUTPUT
+        with open(os.environ["GITHUB_OUTPUT"], "a") as output_file:
+            output_file.write(f"pr_comments={pr_comments}\n")
 
         return 0 if result_text is None else 1
     except Exception as e: