Avoid escaping `permalink`s and `menu.link`

[muzimuzhi]

permaliks are already valid urls, and assume user-configured menu.links in {% for menu in config.extra.juice_extra_menu %} are valid as well, we can safely add Tera filter safe to prevent escaping.

Currently, / in a such valid url will be replaced by /.

Docs for filter safe

• https://www.getzola.org/documentation/getting-started/overview/#templates
• https://tera.netlify.app/docs/#safe

[muzimuzhi]

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