Fixed ref

Author: stevespringett

tools/src/test/resources/1.4/valid-vulnerability-1.4.xml

@@ -99,7 +99,7 @@
             </analysis>
             <affects>
                 <target>
-                    <ref>pkg:maven/com.fasterxml.jackson.core/jackson-databind@2.9.9</ref>
+                    <ref>pkg:maven/com.fasterxml.jackson.core/jackson-databind@2.9.4</ref>
                     <versions>
                         <version>
                             <range>vers:semver/&lt;2.6.7.5</range>