Limit Renovate uv and pnpm updates to one PR per week (#183120)

.github/renovate.json

@@ -326,6 +326,11 @@
       "matchPackageNames": ["/^types-/"],
       "groupName": "types stubs",
       "groupSlug": "types-stubs"
+    },
+    {
+      "description": "uv and pnpm release almost daily, so the cooldown alone still gives a PR (and a full CI run) nearly every day. Limit them to one PR per week.",
+      "matchPackageNames": ["uv", "pnpm"],
+      "schedule": ["after 5pm on friday"]
     }
   ]
 }