fix: CI release.yml

Author: Riflusso

build.gradle.kts

@@ -172,9 +172,10 @@ msPublishing {
         displayName.set("$versionWithoutMC for $loader $mcVersion")
 
         changelog.set(
-            file("CHANGELOG.md")
+            file("../../CHANGELOG.md")
                 .takeIf { it.exists() }
                 ?.readText()
+                ?: "No changelog provided."
         )
 
         type = when {