fix(deps): update dependency rehype-slug to ~5.1.0 (#208)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -63,7 +63,7 @@
     "rehype-prism-plus": "~1.5.0",
     "rehype-raw": "^6.1.1",
     "rehype-rewrite": "~3.0.6",
-    "rehype-slug": "~5.0.1",
+    "rehype-slug": "~5.1.0",
     "remark-gfm": "~3.0.1",
     "unist-util-visit": "^4.1.0"
   },