fix(deps): update dependency com.sparkjava:spark-core to v2.9.4 (#8339)

Author: renovate-bot

appengine-java11/sparkjava-helloworld/pom.xml

@@ -41,7 +41,7 @@ limitations under the License.
     <dependency>
       <groupId>com.sparkjava</groupId>
       <artifactId>spark-core</artifactId>
-      <version>2.9.3</version>
+      <version>2.9.4</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>

appengine-java8/sparkjava-helloworld/pom.xml

@@ -39,7 +39,7 @@ limitations under the License.
     <dependency>
       <groupId>com.sparkjava</groupId>
       <artifactId>spark-core</artifactId>
-      <version>2.9.3</version>
+      <version>2.9.4</version>
       <exclusions>
         <exclusion>
           <groupId>org.eclipse.jetty</groupId>

flexible/java-8/sparkjava/pom.xml

@@ -56,7 +56,7 @@ limitations under the License.
     <dependency>
       <groupId>com.sparkjava</groupId>
       <artifactId>spark-core</artifactId>
-      <version>2.9.3</version>
+      <version>2.9.4</version>
     </dependency>
     <dependency>
       <groupId>org.slf4j</groupId>