Changed Files Output Includes Main Branch's Latest Commit Content

[leavesster]

"I found that the output of the changed files includes not only the contents of the pull request but also the contents of the latest commit in the main branch."

here is my demo's pr

and in action summary, it print the changed files is

Changed Files	content
3f075d7:	README.md
2e1ba5a:	.github/workflows/pull-request.yml index.js

but I only have one commit 3f075d73b1a830f25ddf1f08d0708db66d9f5fbc in this pull request