[1.18.2] Mark older 1.18.X Forge versions unsupported

Author: The-Fireplace

forge/build.gradle

@@ -24,7 +24,7 @@ apply plugin: 'org.spongepowered.mixin'
 archivesBaseName = "${archives_base_name}-Forge"
 final def mainArtifactFile = layout.buildDirectory.file("libs/${archivesBaseName}-${version}.jar").get().asFile
 final def changelogFile = file('../changelog.txt')
-final def supportedMinecraftVersions = [project.minecraft_version, '1.18.1', '1.18']
+final def supportedMinecraftVersions = [project.minecraft_version]
 
 dependencies {
     minecraft "net.minecraftforge:forge:${minecraft_version}-${forge_version}"