FIX: get issues labels

issue: #

 ### 機能・変更内容(ユーザー観点)

 ### 影響範囲・追加でテストしてほしい内容

 ### tech側でテストした内容

index.ts

@@ -901,11 +901,13 @@ async function listIssues(
   // Add all query parameters
   Object.entries(options).forEach(([key, value]) => {
     if (value !== undefined) {
-      if (key === "label_name" && Array.isArray(value)) {
+      if (key === "labels" && Array.isArray(value)) {
         // Handle array of labels
-        url.searchParams.append(key, value.join(","));
+        value.forEach(label => {
+          url.searchParams.append("labels[]", label.toString());
+        });
       } else {
-        url.searchParams.append(key, value.toString());
+        url.searchParams.append("labels[]", value.toString());
       }
     }
   });

schemas.ts

@@ -890,7 +890,7 @@ export const ListIssuesSchema = z.object({
   created_after: z.string().optional().describe("Return issues created after the given time"),
   created_before: z.string().optional().describe("Return issues created before the given time"),
   due_date: z.string().optional().describe("Return issues that have the due date"),
-  label_name: z.array(z.string()).optional().describe("Array of label names"),
+  labels: z.array(z.string()).optional().describe("Array of label names"),
   milestone: z.string().optional().describe("Milestone title"),
   scope: z
     .enum(["created-by-me", "assigned-to-me", "all"])