Merge pull request #459 from sigstore/renovate/com.diffplug.spotless-com.diffplug.spotless.gradle.plugin-6.x

fix(deps): update dependency com.diffplug.spotless:com.diffplug.spotless.gradle.plugin to v6.20.0

Author: loosebazooka

build-logic/jvm/build.gradle.kts

@@ -10,7 +10,7 @@ repositories {
 
 dependencies {
     implementation(embeddedKotlinDsl())
-    implementation("com.diffplug.spotless:com.diffplug.spotless.gradle.plugin:6.18.0")
+    implementation("com.diffplug.spotless:com.diffplug.spotless.gradle.plugin:6.20.0")
     implementation("com.github.vlsi.gradle-extensions:com.github.vlsi.gradle-extensions.gradle.plugin:1.88")
     implementation("de.thetaphi.forbiddenapis:de.thetaphi.forbiddenapis.gradle.plugin:3.4")
     implementation("org.jetbrains.kotlin:kotlin-gradle-plugin")