resources: Update the 'riscv-ubuntu-20.04-img' resource

This relates to changes made here:
https://gem5-review.googlesource.com/c/public/gem5-resources/+/65391

The biggest fix is the addition of "exit.sh" in the "/root" dir. This
script contains nothing but an `m5 exit` command. It is useful for cases
where we want to exit immediately after a kernel boot.

Change-Id: I9700e3415208d7654bc280529154fa27c81e009d
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-resources/+/65811
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: Bobby Bruce <bbruce@ucdavis.edu>
diff --git a/resources.json b/resources.json
index 46fbda9..1135e9e 100644
--- a/resources.json
+++ b/resources.json
@@ -265,8 +265,8 @@
             "documentation" : "A disk image containing Ubuntu 20.04 for RISCV which will run an `m5 readfile` instruction after booting. If no script file is specified an `m5 exit` instruction will be exected",
             "architecture" : "RISCV",
             "is_zipped" : true,
-            "md5sum" : "fece1414df7fa534a837e460095a9be8",
-            "url" : "{url_base}/images/riscv/ubuntu-20-04/riscv-ubuntu-20220318.img.gz",
+            "md5sum" : "e9ea10a3c606d26e2fa2f8ce5d1a8758",
+            "url" : "{url_base}/images/riscv/ubuntu-20-04/riscv-ubuntu-20221118.img.gz",
             "source" : "src/riscv-ubuntu",
             "additional_metadata" : {
                 "root_partition": "1"