Update renovate config

- Disable semantic commits
- Group github action deps

.github/renovate.json

@@ -1,5 +0,0 @@
-{
-  "extends": [
-    "config:base"
-  ]
-}

.github/renovate.json5

@@ -0,0 +1,12 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": ["config:base"],
+  "semanticCommits": "disabled",
+  "packageRules": [
+    {
+      "groupName": "GitHub Actions",
+      "matchManagers": ["github-actions"],
+      "pinDigests": true,
+    }
+  ]
+}