bot: Update snsdemo to release-2024-10-16 (#5652)

# Motivation
We would like to keep the testing environment, provided by snsdemo, up
to date.

# Changes
* Updated `snsdemo` version in `dfx.json`.
* Ensured that the `dfx` version in `dfx.json` matches `snsdemo`.

# Tests
CI should pass.

Co-authored-by: gix-bot <gix-bot@users.noreply.github.com>
Co-authored-by: David de Kloet <122978264+dskloetd@users.noreply.github.com>

dfx.json

@@ -1,5 +1,5 @@
 {
-  "dfx": "0.23.0",
+  "dfx": "0.24.0",
   "canisters": {
     "nns-governance": {
       "type": "custom",
@@ -403,7 +403,7 @@
         "DIDC_VERSION": "didc 0.4.0",
         "POCKETIC_VERSION": "3.0.1",
         "CARGO_SORT_VERSION": "1.0.9",
-        "SNSDEMO_RELEASE": "release-2024-10-09",
+        "SNSDEMO_RELEASE": "release-2024-10-16",
         "IC_COMMIT_FOR_PROPOSALS": "release-2024-09-26_01-31-no-canister-snapshots",
         "IC_COMMIT_FOR_SNS_AGGREGATOR": "release-2024-10-11_14-35-overload"
       },