sp-rand: use black 22 for source code formatting.

Change-Id: Ifff158633afb576a88bef090f34a77e36d95f16b
diff --git a/tools/sp-rand/tox.ini b/tools/sp-rand/tox.ini
index 81307c5..c758a91 100644
--- a/tools/sp-rand/tox.ini
+++ b/tools/sp-rand/tox.ini
@@ -18,14 +18,14 @@
 [testenv:black]
 skip_install = True
 deps =
-  black >= 21b0, < 22b0
+  black >= 22, < 23
 commands =
   black --check {[defs]pyfiles}
 
 [testenv:black-reformat]
 skip_install = True
 deps =
-  black >= 21b0, < 22b0
+  black >= 22, < 23
 commands =
   black {[defs]pyfiles}