fix(deps): update dependency com.mebigfatguy.sb-contrib:sb-contrib to v7.6.4

Author: renovate[bot]

pom.xml

@@ -53,7 +53,7 @@
       Update the version table and the rules count badge in README.md
     -->
     <spotbugs.version>4.8.3</spotbugs.version>
-    <sbcontrib.version>7.6.2</sbcontrib.version>
+    <sbcontrib.version>7.6.4</sbcontrib.version>
     <findsecbugs.version>1.12.0</findsecbugs.version>
 
     <jdk.min.version>1.8</jdk.min.version>