chore(renovate): add renovate configuration to update github workflows

.renovaterc

@@ -0,0 +1,18 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:recommended",
+    ":disableRateLimiting",
+    ":disableVulnerabilityAlerts"
+  ],
+  "labels": [
+    "dependencies"
+  ],
+  "reviewersFromCodeOwners": true,
+  "includePaths": [
+    "**/.github/**"
+  ],
+  "enabledManagers": [
+    "github-actions"
+  ]
+}