Updater: fix potentially erroring in edge case

src/main/updater/http.ts

@@ -51,7 +51,7 @@ async function calculateGitChanges() {
     return data.commits.map((c: any) => ({
         // github api only sends the long sha
         hash: c.sha.slice(0, 7),
-        author: c.author.login,
+        author: c.author?.login ?? c.commit?.author?.name ?? "Unknown Author",
         message: c.commit.message.split("\n")[0]
     }));
 }