[] docs: fix a missing {{#internal}}.
[] is currently blank, with JS error:
Uncaught Error: Unopened section "internal" at 13679
@@ -14143,7 +14143,7 @@ goog.html.SafeUrl.fromConstant = function(url) {
goog.html.SAFE_MIME_TYPE_PATTERN_ = new RegExp(
'^(?:audio/(?:3gpp|3gpp2|aac|midi|mp4|mpeg|ogg|x-m4a|x-wav|webm)|' +
'image/(?:bmp|gif|jpeg|jpg|png|tiff|webp)|' +
- 'text/(?:csv|plain)|' +
+ 'text/csv|' +
'video/(?:mpeg|mp4|ogg|webm))$',
'i');
