Update mdbook version in github actions
## Issue Addressed
Resolves
## Proposed Changes
Always use the latest mdbook version in github actions. [Source](https://github.com/peaceiris/actions-mdbook#%EF%B8%8F-use-the-latest-version-of-mdbook)
@@ -14,7 +14,7 @@ jobs:
- name: Setup mdBook
uses: peaceiris/actions-mdbook@v1
with:
- mdbook-version: '0.3.5'
+ mdbook-version: 'latest'
- run: mdbook build
working-directory: book
