misc: Revert "stdlib: Update the resources.json version to v22.0"

This reverts commit 73da4d794c.
https://gem5-review.googlesource.com/c/public/gem5/+/60531

Change-Id: I01c3879b1f96bd92db60195369354f542f3e829e
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/60636
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>

src/python/gem5/resources/downloader.py

@@ -54,7 +54,7 @@ def _resources_json_version_required() -> str:
     """
     Specifies the version of resources.json to obtain.
     """
-    return "22.0"
+    return "develop"
 
 def _get_resources_json_uri() -> str:
     return "https://resources.gem5.org/resources.json"