chromiumBeta: Fix the source hash

For some reason the hash from 9ec139b became invalid, see NixOS#89615.
The update script does now produce the correct hash.

pkgs/applications/networking/browsers/chromium/upstream-info.nix

@@ -1,7 +1,7 @@
 # This file is autogenerated from update.sh in the same directory.
 {
   beta = {
-    sha256 = "1zy5174admqhb9phpnjb6a20llxbvzfh16cdgj8gh1xk1qjbdlhl";
+    sha256 = "1di0fhhv6lljc2b50i0i8qx5y5xswgxz1bimpda790sb3b1xsdzx";
     sha256bin64 = "1f5qwx4476l4fvbw9w2i22i080bahlf83dzzpnbny7hk831g7msw";
     version = "84.0.4147.38";
   };