Update ddu.vim

Author: Shougo

denops/@ddu-sources/ddc.ts

@@ -1,5 +1,5 @@
-import type { Context, Denops, Item } from "jsr:@shougo/ddu-vim@5.0.0/types";
-import { BaseSource } from "jsr:@shougo/ddu-vim@5.0.0/source";
+import type { Context, Denops, Item } from "jsr:@shougo/ddu-vim@6.2.0/types";
+import { BaseSource } from "jsr:@shougo/ddu-vim@6.2.0/source";
 import type { DdcItem } from "../ddc/types.ts";
 
 import * as vars from "jsr:@denops/std@~7.1.0/variable";