feat: update SiliconFlow API Key descriptions in localization files

webui/i18n/en.json

@@ -93,7 +93,7 @@
     "TTS Provider": "Select the voice synthesis provider",
     "TTS Servers": "TTS Servers",
     "No voices available for the selected TTS server. Please select another server.": "No voices available for the selected TTS server. Please select another server.",
-    "SiliconFlow API Key": "SiliconFlow API Key",
+    "SiliconFlow API Key": "SiliconFlow API Key [Click to get](https://cloud.siliconflow.cn/account/ak)",
     "SiliconFlow TTS Settings": "SiliconFlow TTS Settings",
     "Speed: Range [0.25, 4.0], default is 1.0": "Speed: Range [0.25, 4.0], default is 1.0",
     "Volume: Uses Speech Volume setting, default 1.0 maps to gain 0": "Volume: Uses Speech Volume setting, default 1.0 maps to gain 0",

webui/i18n/zh.json

@@ -93,7 +93,7 @@
     "TTS Provider": "语音合成提供商",
     "TTS Servers": "TTS服务器",
     "No voices available for the selected TTS server. Please select another server.": "当前选择的TTS服务器没有可用的声音，请选择其他服务器。",
-    "SiliconFlow API Key": "硅基流动API密钥",
+    "SiliconFlow API Key": "硅基流动API密钥 [点击获取](https://cloud.siliconflow.cn/account/ak)",
     "SiliconFlow TTS Settings": "硅基流动TTS设置",
     "Speed: Range [0.25, 4.0], default is 1.0": "语速范围 [0.25, 4.0]，默认值为1.0",
     "Volume: Uses Speech Volume setting, default 1.0 maps to gain 0": "音量：使用朗读音量设置，默认值1.0对应增益0",