docs: add note about fuses to our security documentation (#41210)

* Add note about fuses to our security documentation

Additionally, add the missing #18 to the ToC.

* lint issues for security.md

* Update docs/tutorial/security.md

Co-authored-by: Felix Rieseberg <fr@makenotion.com>

* move reference links to bottom of security.md

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Co-authored-by: Felix Rieseberg <fr@makenotion.com>

Co-authored-by: Kilian Valkhof <kilian@kilianvalkhof.com>