ORC-2141: Upgrade spotbugs to 4.9.8

### What changes were proposed in this pull request?

This PR upgrades `spotbugs` to 4.9.8.

### Why are the changes needed?

To bring the dependency up to date with the latest release.

### How was this patch tested?

Pass the existing CI.

### Was this patch authored or co-authored using generative AI tooling?

Generated-by: Claude Code (claude-opus-4-6)

Closes #2591 from dongjoon-hyun/dongjoon/condescending-ellis.

Authored-by: Dongjoon Hyun <dongjoon@apache.org>
Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>

Author: dongjoon-hyun

java/pom.xml

@@ -425,7 +425,7 @@
             <dependency>
               <groupId>com.github.spotbugs</groupId>
               <artifactId>spotbugs</artifactId>
-              <version>4.9.3</version>
+              <version>4.9.8</version>
             </dependency>
           </dependencies>
           <executions>