build(deps): bump mio from 0.8.8 to 0.8.11 in /vmm/task #941

Job	Run time
checks (vmm/sandbox, --all-features)	4m 35s
checks (vmm/task, --all-features)	3m 52s
tests (vmm/sandbox, --all-features)	3m 16s
checks (shim, --all-features)	3m 53s
tests (vmm/task, --all-features)	2m 32s
checks (quark, --all-features)	3m 41s
tests (shim, --all-features)	2m 34s
tests (quark, --all-features)	2m 27s
checks (runc, --all-features)	3m 52s
tests (runc, --all-features)	2m 28s
checks (wasm, --features=wasmedge, 0.11.2)	3m 47s
tests (wasm, --features=wasmedge, 0.11.2)	2m 42s
checks (wasm, --features=wasmtime)	4m 7s
tests (wasm, --features=wasmtime)	3m 4s
	46m 50s

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