Bump the gradle-dependencies group with 2 updates

Bumps the gradle-dependencies group with 2 updates: com.github.spotbugs and edu.sc.seis.launch4j.


Updates `com.github.spotbugs` from 6.0.18 to 6.0.19

Updates `edu.sc.seis.launch4j` from 3.0.5 to 3.0.6

---
updated-dependencies:
- dependency-name: com.github.spotbugs
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: gradle-dependencies
- dependency-name: edu.sc.seis.launch4j
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: gradle-dependencies
...

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

build.gradle

@@ -14,9 +14,9 @@ plugins {
     // Checkstyle enforces consistent formatting rules across the project.
     id 'checkstyle'
     // Spotbugs is a static analyzer for java
-    id 'com.github.spotbugs' version '6.0.18'
+    id 'com.github.spotbugs' version '6.0.19'
     // With this plugin, we can build a Windows executable
-    id 'edu.sc.seis.launch4j' version '3.0.5'
+    id 'edu.sc.seis.launch4j' version '3.0.6'
 }
 
 javafx {