Bump com.diffplug.spotless:spotless-plugin-gradle from 7.0.2 to 8.2.1

Bumps [com.diffplug.spotless:spotless-plugin-gradle](https://github.com/diffplug/spotless) from 7.0.2 to 8.2.1.
- [Release notes](https://github.com/diffplug/spotless/releases)
- [Changelog](https://github.com/diffplug/spotless/blob/main/CHANGES.md)
- [Commits](diffplug/spotless@gradle/7.0.2...gradle/8.2.1)

---
updated-dependencies:
- dependency-name: com.diffplug.spotless:spotless-plugin-gradle
  dependency-version: 8.2.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

build-logic/conventions/build.gradle.kts

@@ -9,7 +9,7 @@ repositories {
 
 dependencies {
     implementation("org.jetbrains.kotlin:kotlin-stdlib")
-    implementation("com.diffplug.spotless:spotless-plugin-gradle:7.0.2")
+    implementation("com.diffplug.spotless:spotless-plugin-gradle:8.2.1")
 }
 
 gradlePlugin {