Improve Docusaurus Dependabot setup (#10262)

* Improve Docusaurus Dependabot setup

* Add slashes to patterns

.github/dependabot.yml

@@ -16,7 +16,20 @@ updates:
       # https://caniuse.com/js-regexp-lookbehind
       - dependency-name: 'decamelize'
       - dependency-name: 'humanize-string'
-
+    groups:
+      # All official @docusaurus/* packages should have the exact same version as @docusaurus/core.
+      # From https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file#groups:
+      # "You cannot apply a single grouping set of rules to both version updates and security
+      # updates [...] you must define two, separately named, grouping sets of rules"
+      # See https://github.com/badges/shields/issues/10242 for more information.
+      docusaurus-version-updates:
+        applies-to: version-updates
+        patterns:
+          - '@docusaurus/*'
+      docusaurus-security-updates:
+        applies-to: security-updates
+        patterns:
+          - '@docusaurus/*'
   # badge-maker package dependencies
   - package-ecosystem: npm
     directory: '/badge-maker'

package.json

@@ -146,6 +146,7 @@
   },
   "devDependencies": {
     "@docusaurus/core": "^3.4.0",
+    "@docusaurus/preset-classic": "^3.4.0",
     "@easyops-cn/docusaurus-search-local": "^0.44.0",
     "@mdx-js/react": "^3.0.1",
     "@typescript-eslint/parser": "^7.13.0",