Update SECURITY.md to use GitHub Security Advisories #803

Job	Run time
checks / readme-snippets	13s
checks / pre-commit	36s
checks / test (3.10, locked, windows-latest)	2m 12s
checks / test (3.12, locked, windows-latest)	3m 23s
checks / test (3.12, lowest-direct, ubuntu-latest)	59s
checks / test (3.14, lowest-direct, windows-latest)	2m 19s
checks / test (3.10, lowest-direct, ubuntu-latest)	56s
checks / test (3.13, lowest-direct, ubuntu-latest)	46s
checks / test (3.13, locked, ubuntu-latest)	47s
checks / test (3.12, locked, ubuntu-latest)	56s
checks / test (3.11, locked, ubuntu-latest)	50s
checks / test (3.11, lowest-direct, ubuntu-latest)	50s
checks / test (3.13, locked, windows-latest)	2m 25s
checks / test (3.13, lowest-direct, windows-latest)	2m 35s
checks / test (3.11, locked, windows-latest)	2m 11s
checks / test (3.14, locked, windows-latest)	4m 35s
checks / test (3.10, locked, ubuntu-latest)	54s
checks / test (3.11, lowest-direct, windows-latest)	2m 42s
checks / test (3.10, lowest-direct, windows-latest)	2m 22s
checks / test (3.14, locked, ubuntu-latest)	2m 19s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 18s
checks / test (3.12, lowest-direct, windows-latest)	3m 37s
all-green	5s
	39m 50s

Provide feedback