(docs deps): Bump remark-lint-no-multiple-toplevel-headings

Bumps [remark-lint-no-multiple-toplevel-headings](https://github.com/remarkjs/remark-lint/tree/HEAD/packages/remark-lint-no-multiple-toplevel-headings) from 3.1.1 to 3.1.2.
- [Release notes](https://github.com/remarkjs/remark-lint/releases)
- [Changelog](https://github.com/remarkjs/remark-lint/blob/main/changelog.md)
- [Commits](https://github.com/remarkjs/remark-lint/commits/HEAD/packages/remark-lint-no-multiple-toplevel-headings)

---
updated-dependencies:
- dependency-name: remark-lint-no-multiple-toplevel-headings
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -73,7 +73,7 @@
     "remark-lint-no-heading-like-paragraph": "^3.1.2",
     "remark-lint-no-inline-padding": "^4.1.2",
     "remark-lint-no-literal-urls": "^3.1.1",
-    "remark-lint-no-multiple-toplevel-headings": "^3.1.1",
+    "remark-lint-no-multiple-toplevel-headings": "^3.1.2",
     "remark-lint-no-reference-like-url": "^3.1.2",
     "remark-lint-no-repeat-punctuation": "^0.1.4",
     "remark-lint-no-shell-dollars": "^3.1.2",