build: move tool updates workflow runtime a day later

Refs: #41973 (comment)

PR-URL: #41982
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Mestery <mestery@protonmail.com>

.github/workflows/tools.yml

@@ -1,8 +1,8 @@
 name: Tools update
 on:
   schedule:
-    # Run once a week at 00:05 AM UTC on Saturday.
-    - cron: 5 0 * * 6
+    # Run once a week at 00:05 AM UTC on Sunday.
+    - cron: 5 0 * * 0
 
   workflow_dispatch: