Replace dead links

worldedit-core/src/main/java/com/sk89q/worldedit/command/UtilityCommands.java

@@ -125,7 +125,7 @@ public class UtilityCommands {
     @Command(
         name = "/heightmapinterface",
             aliases = { "/hmi", "hmi" },
-        desc = "Generate the heightmap interface: https://github.com/boy0001/HeightMap"
+        desc = "Generate the heightmap interface: https://github.com/IntellectualSites/HeightMap"
     )
     @CommandPermissions("fawe.admin")
     public void heightmapInterface(Player player, @Arg(name = "min", desc = "int", def = "100") int min, @Arg(name = "max", desc = "int", def = "200") int max) throws IOException {

worldedit-core/src/main/java/com/sk89q/worldedit/extension/platform/PlatformCommandManager.java

@@ -471,7 +471,7 @@ public final class PlatformCommandManager {
             registerSubCommands(
                 "/anvil",
                 ImmutableList.of(),
-                "Manipulate billions of blocks https://github.com/boy0001/FastAsyncWorldedit/wiki/Anvil-API",
+                "Manipulate billions of blocks",
                 AnvilCommandsRegistration.builder(),
                 new AnvilCommands(worldEdit)
             );