Enable auto-merge on Renovate PRs (#694)

Signed-off-by: Matty Widdop <18513864+MattyTheHacker@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: MattyTheHacker

.github/renovate.json

@@ -1,6 +1,7 @@
 {
     "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-    "assignAutomerge": true,
+    "assignAutomerge": false,
+    "automerge": true,
     "configMigration": true,
     "dependencyDashboard": true,
     "dependencyDashboardAutoclose": true,
@@ -23,6 +24,7 @@
         "dependencies"
     ],
     "lockFileMaintenance": {
+        "automerge": true,
         "enabled": true
     },
     "packageRules": [