...don't create

src/github_actions.rs

@@ -21,8 +21,8 @@ pub(crate) enum Error {
 pub(crate) async fn set_output<'a>(name: &'a str, value: &'a str) -> Result<(), Error> {
     let output_path = std::env::var_os("GITHUB_OUTPUT").ok_or(Error::GithubOutputUnset)?;
     let mut fh = tokio::fs::OpenOptions::new()
-        .read(true)
         .write(true)
+        .append(true)
         .truncate(false)
         .open(&output_path)
         .await