chore(deps): update dependency com.github.spotbugs.snom:spotbugs-gradle-plugin to v6.5.6

Author: renovate[bot]

buildSrc/build.gradle.kts

@@ -14,7 +14,7 @@ dependencies {
     // plugins
     implementation("io.github.gradle-nexus:publish-plugin:2.0.0")
     implementation("org.openapitools:openapi-generator-gradle-plugin:7.23.0")
-    implementation("com.github.spotbugs.snom:spotbugs-gradle-plugin:6.5.5")
+    implementation("com.github.spotbugs.snom:spotbugs-gradle-plugin:6.5.6")
     implementation("org.springframework.boot:spring-boot-gradle-plugin:4.0.6")
 
     // workaround to use libs in a precompiled script plugin.