build(build-logic): fix Spotless targets for Kotlin scripts

The current Spotless configuration for Kotlin scripts uses multiple target() calls. According to the Spotless Javadoc: "When this method is called multiple times, only the last call has any effect."

Consequently, only files in 'build-logic/convention/*.kts' were being formatted, while root and 'build-logic' scripts were ignored.

This commit consolidates all patterns into a single target() call to ensure all intended Kotlin scripts are properly tracked.

build-logic/convention/src/main/kotlin/com/google/samples/apps/nowinandroid/Spotless.kt

@@ -49,9 +49,7 @@ internal fun Project.configureSpotlessForRootProject() {
             endWithNewline()
         }
         format("kts") {
-            target("*.kts")
-            target("build-logic/*.kts")
-            target("build-logic/convention/*.kts")
+            target("*.kts", "build-logic/*.kts", "build-logic/convention/*.kts")
             // Look for the first line that doesn't have a block comment (assumed to be the license)
             licenseHeaderFile(rootDir.resolve("spotless/copyright.kts"), "(^(?![\\/ ]\\*).*$)")
             endWithNewline()