fix -u input read

[dogancanbakir]

Proposed changes

Closes #5141

before:

go run . -u http://scanme.sh,https://www.hackerone.com -s low,medium,high,critical

                     __     _
   ____  __  _______/ /__  (_)
  / __ \/ / / / ___/ / _ \/ /
 / / / / /_/ / /__/ /  __/ /
/_/ /_/\__,_/\___/_/\___/_/   v3.2.6

                projectdiscovery.io

[INF] Current nuclei version: v3.2.6 (latest)
[INF] Current nuclei-templates version: v9.8.5 (latest)
[WRN] Scan results upload to cloud is disabled.
[INF] New templates added in latest release: 142
[INF] Templates loaded for current scan: 4242
[INF] Executing 4194 signed templates from projectdiscovery/nuclei-templates
[WRN] Loading 48 unsigned templates for scan. Use with caution.
[INF] Targets loaded for current scan: 1
[INF] Templates clustered: 301 (Reduced 264 Requests)
[INF] Skipped [scanme.sh,https:]:80 from target list as found unresponsive 30 times
[INF] No results found. Better luck next time!

after:

go run . -u http://scanme.sh,https://www.hackerone.com -s low,medium,high,critical

                     __     _
   ____  __  _______/ /__  (_)
  / __ \/ / / / ___/ / _ \/ /
 / / / / /_/ / /__/ /  __/ /
/_/ /_/\__,_/\___/_/\___/_/   v3.2.6

                projectdiscovery.io

[INF] Current nuclei version: v3.2.6 (latest)
[INF] Current nuclei-templates version: v9.8.5 (latest)
[WRN] Scan results upload to cloud is disabled.
[INF] New templates added in latest release: 142
[INF] Templates loaded for current scan: 4242
[INF] Executing 4194 signed templates from projectdiscovery/nuclei-templates
[WRN] Loading 48 unsigned templates for scan. Use with caution.
[INF] Targets loaded for current scan: 2
[INF] Templates clustered: 301 (Reduced 528 Requests)
...

doc: https://docs.projectdiscovery.io/tools/nuclei/input-formats#list-type

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)

[RamanaReddy0M]

lgtm!