Change condition for is_terminated in Zip #2890

Job	Run time
cargo clippy	23s
cargo +1.36 build (futures-{core, io, sink})	49s
cargo +stable build	40s
cargo bench	54s
cargo +beta build	43s
cargo doc	18s
cargo +nightly build	44s
cargo hack check --feature-powerset	2m 20s
cargo fmt	14s
cargo minimal-versions build	27s
cargo miri test	12m 35s
cargo build --target thumbv7m-none-eabi	25s
cargo test -Z sanitizer=address	3m 21s
cargo build --target thumbv6m-none-eabi	28s
cargo test -Z sanitizer=memory	4m 12s
cargo +1.56 build	1m 16s
cargo test (ubuntu-latest)	2m 43s
cargo test -Z sanitizer=thread	2m 28s
cargo test (macos-latest)	6m 59s
cargo test (windows-latest)	5m 8s
cargo test (ubuntu-latest, aarch64-unknown-linux-gnu)	3m 28s
cargo test (ubuntu-latest, armv7-unknown-linux-gnueabihf)	6m 32s
cargo test (ubuntu-latest, armv5te-unknown-linux-gnueabi)	7m 24s
cargo test (ubuntu-latest, i686-unknown-linux-gnu)	3m 20s
	1h 7m 51s

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