Add Dependabot config (#5)

Author: danbarr

.github/dependabot.yml

@@ -0,0 +1,20 @@
+version: 2
+updates:
+  - package-ecosystem: "npm"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    groups:
+      docusaurus:
+        patterns:
+          - "*docusaurus*"
+    ignore:
+      # Pin key docusaurus dependencies to major versions
+      - dependency-name: "@mdx-js/react"
+        update-types: ["version-update:semver-major"]
+      - dependency-name: "prism-react-renderer"
+        update-types: ["version-update:semver-major"]
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"

package.json

@@ -17,7 +17,7 @@
   "dependencies": {
     "@docusaurus/core": "3.6.3",
     "@docusaurus/preset-classic": "3.6.3",
-    "@docusaurus/theme-mermaid": "^3.6.3",
+    "@docusaurus/theme-mermaid": "3.6.3",
     "@iconify-json/logos": "^1.2.3",
     "@mdx-js/react": "^3.0.0",
     "clsx": "^2.0.0",