fix: ensure decrypter targeting file shall not be pre-existing #241

Job	Run time
Code coverage check	4m 2s
Code coverage check	4m 2s
Unused dependency check	40s
Unused dependency check	40s
Check PR size doesn't break set limit	10s
Check PR size doesn't break set limit	10s
Clippy & fmt	1m 15s
Clippy & fmt	1m 15s
cargo-deny	27s
cargo-deny	27s
Test Publish	51s
Test Publish	51s
Test	2m 8s
Test	2m 8s
Test 32bit	27s
Test 32bit	39s
	20m 12s

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