add support for 1.21.7

Author: CyR1en

src/main/java/com/cyr1en/commandprompter/prompt/PromptManager.java

@@ -67,7 +67,7 @@ public class PromptManager extends HashMap<String, Class<? extends Prompt>> {
 
     private static final HashMap<Class<? extends Prompt>, Version> supportTable;
 
-    private static final Version LATEST = Version.parse("1.21.6");
+    private static final Version LATEST = Version.parse("1.21.7");
     // Arbitrary 10 version, that means this should work until minecraft v10 lol "any".
     private static final Version ANY = Version.parse("10");