Gradle: Bump pl.allegro.tech.build.axion-release from 1.15.5 to 1.18.18

Bumps [pl.allegro.tech.build.axion-release](https://github.com/allegro/axion-release-plugin) from 1.15.5 to 1.18.18.
- [Release notes](https://github.com/allegro/axion-release-plugin/releases)
- [Commits](allegro/axion-release-plugin@v1.15.5...v1.18.18)

---
updated-dependencies:
- dependency-name: pl.allegro.tech.build.axion-release
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

build.gradle.kts

@@ -10,7 +10,7 @@ plugins {
   id("com.diffplug.spotless") version "7.0.2"
   id("org.springframework.boot") version "3.4.1" apply false
   id("io.gitlab.arturbosch.detekt") version "1.23.8"
-  id("pl.allegro.tech.build.axion-release") version "1.15.5"
+  id("pl.allegro.tech.build.axion-release") version "1.18.18"
   id("org.jetbrains.kotlinx.kover") version "0.7.6"
   id("project-report")
   `maven-publish`