fix: git author identity

Author: exuanbo

dist/index.js

@@ -40,8 +40,10 @@ export const run = async (): Promise<void> => {
     const git = simpleGit()
     const gistDir = await createTempDirectory()
     await git.clone(`https://${input.token}@gist.github.com/${input.gistId}.git`, gistDir)
-    await fs.copyFile(filePath, join(gistDir, fileName))
     await git.cwd(gistDir)
+    await git.addConfig('user.name', process.env.GITHUB_ACTOR!)
+    await git.addConfig('user.email', `${process.env.GITHUB_ACTOR}@users.noreply.github.com`)
+    await fs.copyFile(filePath, join(gistDir, fileName))
     await git.add(fileName)
     await git.commit(`Add ${fileName}`)
     await git.push('origin', 'master')