Fix pick of licenseHeaderFileName for private project (#35)

Author: jonas-wielage-sonarsource

gradle-modules/src/main/kotlin/org.sonarsource.cloud-native.code-style-conventions.gradle.kts

@@ -25,7 +25,7 @@ val codeStyleConvention = extensions.create<CodeStyleConvention>("codeStyleConve
 codeStyleConvention.editorConfigPath.convention(layout.settingsDirectory.file("build-logic/common/.editorconfig"))
 
 val kotlinGradleDelimiter = "(package|import|plugins|pluginManagement|dependencyResolutionManagement|repositories) "
-val licenseHeaderFileName = if (project.path.startsWith(":private:")) "private/LICENSE_HEADER_PRIVATE" else "LICENSE_HEADER"
+val licenseHeaderFileName = if (project.path.startsWith(":private")) "private/LICENSE_HEADER_PRIVATE" else "LICENSE_HEADER"
 val licenseHeaderFile = rootProject.file(licenseHeaderFileName)
 
 spotless {