Add recommendation about SECURITY.md in Eclipse Handbook

There is no mention of a SECURITY.md file in the Handbook. I think we should promote it from the handbook.

moved from eclipsefdn/helpdesk#1724 (moved)

added EMO in Eclipse Foundation / Help Desk @eclipsefdn~26594 @eclipsefdn~43153 labels

/cc @wbeaton

Related:

• #160 (closed)
• #30 (closed)
• #150

I think that #150 might be a duplicate.

Right, my bad.

marked this issue as a duplicate of #150

closed

marked this issue as related to #150