add configuration changes

Author: ColinKrist

renovate.json

@@ -1,6 +1,18 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
-    "config:base"
+    "config:base",
+    "helpers:pinGitHubActionDigests"
+  ],
+  "npm": {
+    "stabilityDays": 3
+  },
+  "packageRules": {
+    "matchPaths": ["package.json"]
+  },
+  "pinVersions": false,
+  "schedule": [
+    "on Friday",
+    "every weekend"
   ]
 }