chore: tweak link check workflow and renovate config

Signed-off-by: Devin Buhl <devin@buhl.casa>

.github/renovate/autoMerge.json5

@@ -0,0 +1,13 @@
+{
+  "packageRules": [
+    {
+      "description": "Auto merge GitHub Actions",
+      "matchManagers": ["github-actions"],
+      "matchDatasources": ["github-tags"],
+      "automerge": true,
+      "automergeType": "branch",
+      "requiredStatusChecks": null,
+      "matchUpdateTypes": ["minor", "patch"]
+    }
+  ]
+}