Add the OpenSSF Badge to the new site

[bmuenzenmeyer]

Placeholder so we don't forget to port this work to the new site design - where it will likely not be in the footer.

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do we know what content is within the new "Security Reporting" page? if it's just a rename of the current "Security" page, that wont work well - as that's just a link to https://github.com/nodejs/node/security/policy#security

Originally posted by @bmuenzenmeyer in #5432 (comment)

[bmuenzenmeyer]

#6030 added the badge to the existing site

[ovflowd]

@bmuenzenmeyer I assume this is ready to be tackled now?

[bmuenzenmeyer]

Yes it could be added to the now present page.