Fix Windows failing to execute run configs

Author: Jonathing

fg-plugin/src/main/groovy/net/minecraftforge/gradle/Constants.java

@@ -13,7 +13,7 @@ final class Constants {
 
     static final String FORGE_MAVEN = "https://maven.minecraftforge.net/";
 
-    static final String MCMAVEN_VERSION = "0.3.0";
+    static final String MCMAVEN_VERSION = "0.3.1";
     static final String MCMAVEN_DL_URL = "https://maven.minecraftforge.net/net/minecraftforge/minecraft-mavenizer/" + MCMAVEN_VERSION + "/minecraft-mavenizer-" + MCMAVEN_VERSION + ".jar";
     static final String MCMAVEN_MAIN = "net.minecraftforge.mcmaven.cli.Main";
     static final int MCMAVEN_JAVA_VERSION = 21;