scanners: add ZGrab
scanners: add ZGrab

coreruleset/coreruleset,SpiderLabs/owasp-modsecurity-crs,SpiderLabs/owasp-modsecurity-crs,SpiderLabs/owasp-modsecurity-crs,SpiderLabs/owasp-modsecurity-crs,coreruleset/coreruleset,SpiderLabs/owasp-modsecurity-crs,coreruleset/coreruleset,SpiderLabs/owasp-modsecurity-crs,SpiderLabs/owasp-modsecurity-crs,coreruleset/coreruleset,coreruleset/coreruleset,coreruleset/coreruleset