doc: add CODEOWNERS #440

Job	Run time
tests (vmm/sandbox, --all-features)	5m 12s
tests (vmm/task, --all-features)	4m 12s
tests (shim, --all-features)	5m 15s
tests (quark, --all-features)	4m 4s
tests (wasm, --features=wasmedge, 0.11.2)	5m 42s
tests (wasm, --features=wasmtime)	5m 17s
checks (vmm/sandbox, --all-features)	8m 50s
checks (vmm/task, --all-features)	7m 14s
checks (shim, --all-features)	9m 6s
checks (quark, --all-features)	8m 38s
checks (wasm, --features=wasmedge, 0.11.2)	7m 32s
checks (wasm, --features=wasmtime)	8m 2s
	1h 19m 4s

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