fix dead link to issue.go in README.md (#936)

Author: dmur1

README.md

@@ -188,7 +188,7 @@ $ gosec -exclude=G303 ./...
 
 ### CWE Mapping
 
-Every issue detected by `gosec` is mapped to a [CWE (Common Weakness Enumeration)](http://cwe.mitre.org/data/index.html) which describes in more generic terms the vulnerability. The exact mapping can be found  [here](https://github.com/securego/gosec/blob/master/issue.go#L50).
+Every issue detected by `gosec` is mapped to a [CWE (Common Weakness Enumeration)](http://cwe.mitre.org/data/index.html) which describes in more generic terms the vulnerability. The exact mapping can be found  [here](https://github.com/securego/gosec/blob/master/issue/issue.go#L50).
 
 ### Configuration