Update plugin buildConfig to v5.6.8

Author: renovate[bot]

gradle/libs.versions.toml

@@ -46,7 +46,7 @@ jetbrains-bcv = "org.jetbrains.kotlinx.binary-compatibility-validator:0.18.1"
 jetbrains-compose = { id = "org.jetbrains.compose", version.ref = "compose" }
 jetbrains-intellij = { id = "org.jetbrains.intellij.platform", version.ref = "intellij" }
 jetbrains-intellij-module = { id = "org.jetbrains.intellij.platform.module", version.ref = "intellij" }
-buildConfig = "com.github.gmazzo.buildconfig:5.6.7"
+buildConfig = "com.github.gmazzo.buildconfig:5.6.8"
 shadow = "com.gradleup.shadow:9.1.0"
 spotless = "com.diffplug.spotless:7.2.1"