fixed team count (openfrontio#654)

## Description:
fixed .w.

<img width="541" alt="スクリーンショット 2025-05-05 11 22 34"
src="https://github.com/user-attachments/assets/4c324d64-a9cd-44a8-a72b-2465849303c9"
/>

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

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

Author: Aotumuri

resources/lang/en.json

@@ -146,7 +146,7 @@
   "public_lobby": {
     "join": "Join next Game",
     "waiting": "players waiting",
-    "teams": "Team count:"
+    "teams": "{num} teams"
   },
   "username": {
     "enter_username": "Enter your username",

resources/lang/ja.json

@@ -138,7 +138,7 @@
   "public_lobby": {
     "join": "次のゲームに参加",
     "waiting": "人が参加しています...",
-    "teams": "チームの数:"
+    "teams": "{num}チーム"
   },
   "username": {
     "enter_username": "ユーザー名を入力",

src/client/PublicLobby.ts

@@ -132,16 +132,9 @@ export class PublicLobby extends LitElement {
               </div>
               <div class="text-md font-medium text-blue-100">
                 ${lobby.gameConfig.gameMode == GameMode.Team
-                  ? translateText("game_mode.teams")
+                  ? translateText("public_lobby.teams", { num: teamCount })
                   : translateText("game_mode.ffa")}
               </div>
-              ${teamCount !== null
-                ? html`
-                    <div class="text-md font-medium text-blue-100">
-                      ${translateText("public_lobby.teams")} ${teamCount}
-                    </div>
-                  `
-                : null}
             </div>
             <div class="flex flex-col items-center">
               <div class="text-md font-medium text-blue-100 mb-2">