Fix: false positive detection for Topcoder (#2669)

[gaurav4288]

🧠 Pull Request Description

Summary
This PR fixes a false positive for the Topcoder site reported in Issue #2669.
Previously, Sherlock incorrectly detected existing accounts for usernames that did not exist.

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Changes Made

• Updated the Topcoder username regex pattern in sherlock/resources/data.json.

• Replaced the old pattern:
  [a-zA-Z0-9 ]

• with the corrected one:
  ^[A-Za-z0-9 _-]{1,50}$

• This ensures proper validation of Topcoder usernames (letters, numbers, underscores, and hyphens within 1–50 characters).

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Verification

• ✅ Tested Sherlock with multiple valid and invalid usernames.
• ✅ Valid usernames are detected correctly.
• ✅ Invalid usernames (containing spaces or disallowed characters) are rejected.
• ✅ Eliminated the false positives previously reported.

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Related Issue
Closes #2669

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Testing Example

python -m sherlock_project john0011 --site Topcoder
python -m sherlock_project --local john0011

[github-actions]

Automatic validation of changes

Target	F+ Check	F- Check
Topcoder	✔️   Pass	✔️   Pass

[ppfeister]

Did you confirm that the maximum username length is actually 50 chars? If so, that'll be a stronger pattern to use than a wildcard quantifier.

[gaurav4288]

yes

[ppfeister]

Looks like 2-15 rather than 1-50? Are there legacy accounts with the larger range, maybe?