chore(deps): update plugin org.jetbrains.kotlinx.kover to v0.7.4

Author: renovate[bot]

build.gradle.kts

@@ -1,7 +1,7 @@
 plugins {
     kotlin("jvm") version "1.9.20"
     id("net.minecrell.plugin-yml.bukkit") version "0.6.0" apply false
-    id("org.jetbrains.kotlinx.kover") version "0.6.1"
+    id("org.jetbrains.kotlinx.kover") version "0.7.4"
     id("org.jetbrains.dokka") version "1.9.10"
     id("org.jmailen.kotlinter") version "3.13.0"
     id("dev.s7a.gradle.minecraft.server") version "3.0.0" apply false