Update version to v1.18.5 (#35405) #8002

Job	Run time
check	0s
cargo-test-sbf (token/program)	8m 38s
test	0s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	15m 4s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	7m 55s
cargo-test-sbf (token-upgrade/program)	8m 56s
cargo-test-sbf (feature-proposal/program)	6m 58s
cargo-test-sbf (governance/addin-mock/program, governance/program)	13m 5s
cargo-test-sbf (memo/program)	7m 51s
cargo-test-sbf (name-service/program)	6m 41s
cargo-test-sbf (stake-pool/program)	10m 17s
cargo-test-sbf (single-pool/program)	8m 31s
	1h 33m 56s

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