CHORE(theme)!: update Git submodule (use 5adda22 instead off 299ff84c)

Update Git submodule of theme:
- old ref: theme-hugo_faq.adullact.org@299ff84c
- new ref: theme-hugo_faq.adullact.org@5adda22a

BREAKING CHANGE: update Git submodule on your local repository

hugo-geekdoc-adullact @ 5adda22a

-Subproject commit 299ff84caa6e68885535ceb20c592f82a372501d
+Subproject commit 5adda22a83235a66de631b1bb11c78e9417ca39d