added extractor

http/cves/2021/CVE-2021-46704.yaml

@@ -17,7 +17,7 @@ info:
     cwe-id: CWE-78
   metadata:
     max-request: 1
-    verified: "true"
+    verified: true
     shodan-query: http.favicon.hash:-2098066288
   tags: cve,cve2021,genieacs,rce
 
@@ -41,3 +41,9 @@ http:
       - type: status
         status:
           - 500
+
+    extractors:
+      - type: regex
+        part: body
+        regex:
+          - uid=(\d+)\((\w+)\)