Bump hexo-markmap from 1.2.5 to 2.0.8

Bumps [hexo-markmap](https://github.com/MaxChang3/hexo-markmap) from 1.2.5 to 2.0.8.
- [Release notes](https://github.com/MaxChang3/hexo-markmap/releases)
- [Commits](https://github.com/MaxChang3/hexo-markmap/compare/v1.2.5...v2.0.8)

---
updated-dependencies:
- dependency-name: hexo-markmap
  dependency-version: 2.0.8
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

package.json

@@ -24,7 +24,7 @@
     "hexo-generator-sitemap": "^3.0.1",
     "hexo-generator-tag": "^2.0.0",
     "hexo-helper-live2d": "^3.1.1",
-    "hexo-markmap": "^1.2.5",
+    "hexo-markmap": "^2.0.8",
     "hexo-neat": "^1.0.9",
     "hexo-related-posts": "^1.6.2",
     "hexo-renderer-ejs": "^2.0.0",