test(worktree): parameterise duplicate-check tests with it.each

Matches the existing it.each pattern for the ASCII-letter check in the
same file. Net -3 lines, same coverage.

Per Greptile review feedback on #2149.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: agallardol

packages/git/src/worktree-names.test.ts

@@ -33,12 +33,11 @@ describe("worktree name word lists", () => {
     expect(ADJECTIVES.length * NOUNS.length).toBeGreaterThanOrEqual(10_000);
   });
 
-  it("has no duplicate adjectives", () => {
-    expect(new Set(ADJECTIVES).size).toBe(ADJECTIVES.length);
-  });
-
-  it("has no duplicate nouns", () => {
-    expect(new Set(NOUNS).size).toBe(NOUNS.length);
+  it.each([
+    ["adjectives", ADJECTIVES],
+    ["nouns", NOUNS],
+  ] as const)("%s contain no duplicates", (_label, list) => {
+    expect(new Set(list).size).toBe(list.length);
   });
 
   it("has no overlap between adjectives and nouns", () => {