Bump com.github.spotbugs from 6.2.1 to 6.2.4

Bumps com.github.spotbugs from 6.2.1 to 6.2.4.

---
updated-dependencies:
- dependency-name: com.github.spotbugs
  dependency-version: 6.2.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

build.gradle

@@ -1,7 +1,7 @@
 plugins {
     id 'java'
     id 'application'
-    id "com.github.spotbugs" version "6.2.1"
+    id "com.github.spotbugs" version "6.2.4"
     id 'pmd'
     id 'checkstyle'
     id "net.davidecavestro.gradle.jxr" version "0.2.1"