Bump book/external/Nested-Books from 63b9a9e to 587accb

Bumps [book/external/Nested-Books](https://github.com/TeachBooks/Nested-Books) from `63b9a9e` to `587accb`.
- [Commits](63b9a9e747...587accb350)

---
updated-dependencies:
- dependency-name: book/external/Nested-Books
  dependency-type: direct:production
...

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This commit is contained in:
dependabot[bot] 2024-12-31 09:29:39 +00:00 • committed by GitHub
parent 309ff0464f
commit 696e60af9a
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@ -1 +1 @@
Subproject commit 63b9a9e747e3fb7511e7e98514648f5d8ee9d010
Subproject commit 587accb350eae83cf7521a2fad5d18d6cb127698