fix: chinese typo (#327)

必需 -> 必须

Reviewed-on: https://gitea.angry.im/PeterCxy/OpenEUICC/pulls/327
Co-authored-by: septs <github@septs.pw>
Co-committed-by: septs <github@septs.pw>

app-common/src/main/res/values-zh-rCN/strings.xml

@@ -43,7 +43,7 @@
     <string name="euicc_info_sku">产品名称</string>
     <string name="euicc_info_sn">产品序列号</string>
     <string name="euicc_info_fw_ver">产品固件版本</string>
-    <string name="profile_download_confirmation_code_required">确认码 (必需)</string>
+    <string name="profile_download_confirmation_code_required">确认码 (必须)</string>
     <string name="profile_download_imei">IMEI (可选)</string>
     <string name="download_wizard_error_suggest_network_unreachable">请连接到其他网络（例如在 Wi-Fi 和数据之间切换）后重试。</string>
     <string name="logs_saved_message">日志已保存到指定路径。需要通过其他 App 分享吗？</string>

app-common/src/main/res/values-zh-rTW/strings.xml

@@ -43,7 +43,7 @@
     <string name="euicc_info_sku">產品名稱</string>
     <string name="euicc_info_sn">產品序號</string>
     <string name="euicc_info_fw_ver">產品韌體版本</string>
-    <string name="profile_download_confirmation_code_required">確認碼 (必需)</string>
+    <string name="profile_download_confirmation_code_required">確認碼 (必須)</string>
     <string name="profile_download_imei">IMEI (可選)</string>
     <string name="download_wizard_error_suggest_network_unreachable">請連線到其他網路（例如在 Wi-Fi 和行動網路之間切換）後重試。</string>
     <string name="logs_saved_message">日誌已儲存到指定路徑。需要透過其他 App 分享嗎？</string>