Update dependency com.diffplug.eclipse.apt:com.diffplug.eclipse.apt.gradle.plugin to v3.28.1

Author: renovate-bot

build.gradle.kts

@@ -1,6 +1,6 @@
 plugins {
     base
-    id("com.diffplug.eclipse.apt") version "3.28.0" apply false
+    id("com.diffplug.eclipse.apt") version "3.28.1" apply false
     id("com.diffplug.spotless") version "5.10.2"
     id("de.marcphilipp.nexus-publish") version "0.4.0" apply false
     id("io.codearte.nexus-staging") version "0.22.0"