fix: update RTSP User-Agent description to use placeholder format

Author: stackia

openwrt-support/luci-app-rtp2httpd/htdocs/luci-static/resources/view/rtp2httpd.js

@@ -584,7 +584,7 @@ return view.extend({
       "rtsp_user_agent",
       _("RTSP User-Agent"),
       _(
-        "User-Agent header used for upstream RTSP requests. Leave empty to use the default rtp2httpd/<version>."
+        "User-Agent header used for upstream RTSP requests. Leave empty to use the default rtp2httpd/{version}."
       )
     );
     o.depends("use_config_file", "0");

openwrt-support/luci-app-rtp2httpd/po/templates/rtp2httpd.pot

@@ -310,7 +310,7 @@ msgstr ""
 #: htdocs/luci-static/resources/view/rtp2httpd.js:587
 msgid ""
 "User-Agent header used for upstream RTSP requests. Leave empty to use the "
-"default rtp2httpd/<version>."
+"default rtp2httpd/{version}."
 msgstr ""
 
 #: htdocs/luci-static/resources/view/rtp2httpd.js:596

openwrt-support/luci-app-rtp2httpd/po/zh_Hans/rtp2httpd.po

@@ -343,10 +343,10 @@ msgstr "使用配置文件而不是单独的选项"
 #: htdocs/luci-static/resources/view/rtp2httpd.js:587
 msgid ""
 "User-Agent header used for upstream RTSP requests. Leave empty to use the "
-"default rtp2httpd/<version>."
+"default rtp2httpd/{version}."
 msgstr ""
 "用于上游 RTSP 请求的 User-Agent 请求头。留空则使用默认的 rtp2httpd/"
-"<version>。"
+"{version}。"
 
 #: htdocs/luci-static/resources/view/rtp2httpd.js:596
 msgid "Video Snapshot"