Bump markdownlint from 0.39.0 to 0.40.0 (#5)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package.json

@@ -1,6 +1,6 @@
 {
   "devDependencies": {
-    "markdownlint": "^0.39.0",
+    "markdownlint": "^0.40.0",
     "markdownlint-cli": "^0.47.0",
     "vitepress": "^2.0.0-alpha.15"
   },