[ez][disablebot] Lower threshold for creating aggregate flaky issues 10 -> 4 (#6849)

10 is kind of high, IMO lowering it would be ok since its still annoying
if there are >4 issues created at once that all seem related. The
restriction that they all be from the same file is strict enough so that
lowering is ok i think

See the successfully created disable issues here:
https://github.com/pytorch/pytorch/issues?q=state%3Aopen%20label%3A%22aggregate%20flaky%20test%20issue%22

(Now we just have to see if they also get updated automatically too)

Author: clee2000

torchci/pages/api/flaky-tests/disable.ts

@@ -14,7 +14,7 @@ import { Octokit } from "octokit";
 
 export const NUM_HOURS = 3;
 const PYTORCH = "pytorch";
-const THRESHOLD = 10;
+const THRESHOLD = 4;
 
 export default async function handler(
   req: NextApiRequest,