fix: Missing close statements file.Close() & ticker.Stop()

[ShuBo6]

Proposed changes

Checklist

• Pull request is created against the dev branch
• All checks passed (lint, unit/integration/regression tests etc.) with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[GeorginaReeder]

Thanks for your contribution @ShuBo6 !

[ShuBo6]

There are errors in the testing process, but they don't seem to be related to the impact of the changes I'm making in this commit. Do I need to make any changes?

[tarunKoyalwar]

lgtm ! thanks for contributing @ShuBo6

about the test github actions are sometimes flaky, works fine locally

CI=true go test -v ./...                                                           
ok  	github.com/projectdiscovery/nuclei/v3/lib	0.973s
=== RUN   TestSimpleNuclei
[INF] Templates clustered: 14 (Reduced 10 Requests)
[nameserver-fingerprint] scanme.sh
[caa-fingerprint] scanme.sh
{"duration":"0:00:01","errors":"1","hosts":"1","matched":"2","percent":"94","requests":"16","rps":"26","startedAt":"2024-07-24T16:46:53.328694+05:30","templates":"24","total":"17"}
--- PASS: TestSimpleNuclei (4.01s)
=== RUN   TestSimpleNucleiRemote
[nameserver-fingerprint] scanme.sh
--- PASS: TestSimpleNucleiRemote (3.00s)
=== RUN   TestThreadSafeNuclei
=== RUN   TestThreadSafeNuclei/scanme.sh
[INF] Templates clustered: 14 (Reduced 10 Requests)
[nameserver-fingerprint] scanme.sh
[caa-fingerprint] scanme.sh
=== RUN   TestThreadSafeNuclei/honey.scanme.sh
[INF] Templates clustered: 14 (Reduced 10 Requests)
[caa-fingerprint] honey.scanme.sh
--- PASS: TestThreadSafeNuclei (4.29s)
    --- PASS: TestThreadSafeNuclei/scanme.sh (1.18s)
    --- PASS: TestThreadSafeNuclei/honey.scanme.sh (1.02s)
PASS
ok  	github.com/projectdiscovery/nuclei/v3/lib/tests	12.601s

also curious where you using any automated tool for detection or reviewing the codebase ?