Bump com.gradle.plugin-publish from 1.3.0 to 1.3.1 in /examples

Bumps com.gradle.plugin-publish from 1.3.0 to 1.3.1.

---
updated-dependencies:
- dependency-name: com.gradle.plugin-publish
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle

@@ -3,7 +3,7 @@ plugins {
     id 'io.freefair.github.dependency-submission'
     id 'io.freefair.maven-central.validate-poms' apply false
     id 'io.freefair.lombok' apply false
-    id "com.gradle.plugin-publish" version "1.3.0" apply false
+    id "com.gradle.plugin-publish" version "1.3.1" apply false
     id "io.github.gradle-nexus.publish-plugin" version "2.0.0"
     id 'org.jetbrains.kotlin.jvm' apply false
 }