build(deps): bump github/codeql-action from 2.20.0 to 2.21.2 #991

Job	Run time
build-date-epoch	1m 32s
source-date-epoch	1m 45s
build-all-examples-amd64 (ubuntu-latest)	1m 1s
build-all-examples-amd64 (macos-latest)	1m 50s
build-nginx-all-arches (x86_64)	36s
build-nginx-all-arches (386)	11m 33s
build-nginx-all-arches (armv7)	31s
build-nginx-all-arches (aarch64)	26s
build-nginx-all-arches (riscv64)	29s
build-nginx-all-arches (s390x)	37s
build-nginx-all-arches (ppc64le)	23s
annotations	31s
	21m 14s

Provide feedback