build(deps): bump base64 from 0.21.4 to 0.21.5 #323

Job	Run time
cargo-test-sbf (token/program)	16m 19s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	26m 14s
check	0s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	18m 9s
cargo-test-sbf (token-upgrade/program)	17m 12s
test	0s
cargo-test-sbf (feature-proposal/program)	17m 8s
cargo-test-sbf (governance/addin-mock/program, governance/program)	23m 17s
cargo-test-sbf (memo/program)	17m 28s
cargo-test-sbf (name-service/program)	16m 48s
cargo-test-sbf (stake-pool/program)	23m 11s
cargo-test-sbf (single-pool/program)	18m 14s
	3h 14m 0s

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