I would never recommend Odoo anymore, given how painful it is to upgrade from a major version to another. Their answer to it is basically “yeah, some complex migrations need to be done, just send us a copy of your database with highly sensitive company data, pay us to do the migration and we’ll send it back to you”. Yeah, lol, no.
What’s your existing setup? For such a simple task, check if any of the tools you use currently can be adapted (simple text files on a web server? File sharing like Nextcloud and text files? Pastebin-like? Wiki? …). Otherwise a simple Shaarli instance could do the trick (just post “notes” aka. bookmarks without an URL). I use this theme to make it nicer. Or maybe a static site generator/blog.