chore(deps): update dependency com.github.spotbugs:spotbugs to v4.9.4

Author: renovate[bot]

pom.xml

@@ -116,7 +116,7 @@
             <!-- used so that lombok can generate suppressions for spotbugs. It needs to find it on the relevant classpath -->
             <groupId>com.github.spotbugs</groupId>
             <artifactId>spotbugs</artifactId>
-            <version>4.8.6</version>
+            <version>4.9.4</version>
             <scope>provided</scope>
         </dependency>
 
@@ -469,7 +469,7 @@
                             <dependency>
                                 <groupId>com.github.spotbugs</groupId>
                                 <artifactId>spotbugs</artifactId>
-                                <version>4.9.0</version>
+                                <version>4.9.4</version>
                             </dependency>
                         </dependencies>
                         <executions>