Fix README malware report links

[wenxiaojie1]

Summary

• update README malware family report links from the removed quark_rules.html page to malware_report.html
• use the existing section anchors for BRATA, Cerberus, SuperCardX, and NGate

Verification

• confirmed no quark_rules.html links remain in README
• fetched the published malware_report.html page and verified all 19 README anchors exist

Closes #940

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.89%. Comparing base (1df1d49) to head (7a4aca7).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #942   +/-   ##
=======================================
  Coverage   78.89%   78.89%           
=======================================
  Files          81       81           
  Lines        7131     7131           
=======================================
  Hits         5626     5626           
  Misses       1505     1505           

Flag	Coverage Δ
unittests	78.89% <ø> (ø)

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