Docs: add security policy #2386

Job	Run time
path-filter	4s
npm-exec-merge-comment	21s
pkg-pr-new	30s
test-package-status-check	5s
test-npm-install-global (${{ matrix.os }})	0s
test-npx (${{ matrix.os }})	0s
npm-exec-branch-comment	0s
	1m 0s

Provide feedback