Update Docusaurus dependencies to version 3.9.0 (#893)

- Updated @docusaurus/core from ^3.8.1 to ^3.9.0
- Updated @docusaurus/faster from ^3.8.1 to ^3.9.0
- Updated @docusaurus/plugin-client-redirects from ^3.8.1 to ^3.9.0
- Updated @docusaurus/preset-classic from ^3.8.1 to ^3.9.0
- Updated @docusaurus/theme-common from ^3.8.1 to ^3.9.0
- Updated @docusaurus/theme-search-algolia from ^3.8.1 to ^3.9.0
- Updated @docusaurus/module-type-aliases from ^3.8.1 to ^3.9.0
- Updated @docusaurus/tsconfig from ^3.8.1 to ^3.9.0
- Updated @docusaurus/types from ^3.8.1 to ^3.9.0

Build tested successfully with npm run build

Author: LaurenceJJones