Update plugin spotless to v7 (#1265)

Author: nakamura-to

gradle/libs.versions.toml

@@ -31,7 +31,7 @@ ktlint = { module = "com.pinterest.ktlint:ktlint-cli", version = "1.5.0" }
 [plugins]
 kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
 kotlin-kapt = { id = "org.jetbrains.kotlin.kapt", version.ref = "kotlin" }
-spotless = { id = "com.diffplug.spotless", version = "6.25.0" }
+spotless = { id = "com.diffplug.spotless", version = "7.0.1" }
 publish = { id = "io.github.gradle-nexus.publish-plugin", version = "2.0.0" }
 release = { id = "net.researchgate.release", version = "3.1.0" }
 doma-compile = { id = "org.domaframework.doma.compile", version = "3.0.1" }