Fix off by one error (#3827)

## Description:

Currently it is impossible to search for 2 letter clan tags (UN, FR,
EU), this is because of an off by one error present in the API

## Please complete the following:

- [X] I have added screenshots for all UI updates
- [X] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [X] I have added relevant tests to the test directory
- [X] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

Babyboucher

tests/client/clan/ClanApiQueries.test.ts

@@ -193,20 +193,6 @@ describe("fetchClans", () => {
     expect(url.searchParams.get("search")).toBe("abc");
   });
 
-  it("omits search param for 2-char query (below min length of 3)", async () => {
-    const fetchSpy = vi.fn(
-      (_input: string | URL | Request, _init?: RequestInit) =>
-        Promise.resolve(okJson(browseResponse)),
-    );
-    vi.stubGlobal("fetch", fetchSpy);
-
-    await fetchClans("AB", 1, 20);
-
-    const calledUrl = fetchSpy.mock.calls[0]![0] as string;
-    const url = new URL(calledUrl);
-    expect(url.searchParams.get("search")).toBeNull();
-  });
-
   it("omits search param when too short and non-alphanumeric", async () => {
     const fetchSpy = vi.fn(
       (_input: string | URL | Request, _init?: RequestInit) =>