docs: fix security policy linking and add citations #3413

Job	Run time
Build aarch64-apple-darwin	7m 6s
Build debian-x86_64	7m 18s
Build x86_64-apple-darwin	17m 25s
Build and test docker images	16m 1s
Build x86_64-pc-windows-msvc	16m 6s
Build x86_64-unknown-linux-gnu	7m 14s
Lint and Unit test	2m 36s
Test AWS Lambda	19s
Test on macos-13	10m 24s
Test postgis:11-3.0-alpine sslmode=disable	4m 36s
Test on windows-latest	1m 27s
Test postgis:14-3.3-alpine sslmode=disable	4m 56s
Test on ubuntu-latest	58s
Test postgis:15-3.3 sslmode=require	4m 42s
Package	0s
CI Finished	0s
	1h 41m 8s

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