Update plugin buildConfig to v5.4.0 (#337)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

gradle/libs.versions.toml

@@ -35,7 +35,7 @@ android-application = { id = "com.android.application", version.ref = "agp" }
 android-library = { id = "com.android.library", version.ref = "agp" }
 android-lint = { id = "com.android.lint", version.ref = "agp" }
 android-test = { id = "com.android.test", version.ref = "agp" }
-buildConfig = "com.github.gmazzo.buildconfig:5.3.5"
+buildConfig = "com.github.gmazzo.buildconfig:5.4.0"
 cacheFixPlugin = { id = "org.gradle.android.cache-fix", version = "3.0.1" }
 composeMultiplatform = { id = "org.jetbrains.compose", version.ref = "compose-multiplatform" }
 kotlin-core = { id = "org.jetbrains.kotlin:kotlin-gradle-plugin", version.ref = "kotlin" }