Add weekly patch grouping (#208)

Author: trask

.github/renovate.json5

@@ -5,12 +5,25 @@
     "helpers:pinGitHubActionDigestsToSemver",
   ],
   "packageRules": [
+
+    // ── Scheduling & grouping ──────────────────────────────────────────
+
     {
-      // this is to reduce the number of renovate PRs by consolidating them into a weekly batch
+      // group all patch updates into a single weekly PR
+      "groupName": "all patch versions",
+      "matchUpdateTypes": ["patch"],
+      "schedule": ["before 8am on Tuesday"]
+    },
+    {
+      // group all GitHub Actions updates into a single weekly PR
+      // (must be after patch rule so that it wins for GH Action patches)
       "matchManagers": ["github-actions"],
       "extends": ["schedule:weekly"],
       "groupName": "github actions"
     },
+
+    // ── Disabled updates (Java version compatibility) ──────────────────
+
     {
       // junit 6+ requires Java 17+
       matchPackageNames: [