rustdoc: fix outdated lint section of the book

diff --git a/src/doc/rustdoc/src/lints.md b/src/doc/rustdoc/src/lints.md
index bff01d7cb7c14ef5a0544ff0089e30de545133a4..45db3bb9b007b99e1f8f71e21e120fe0863bf482 100644 (file)
--- a/src/doc/rustdoc/src/lints.md
+++ b/src/doc/rustdoc/src/lints.md
@@ -261,7 +261,7 @@ typo mistakes for some common attributes.
 
 ## `invalid_html_tags`
 
-This lint is **allowed by default** and is **nightly-only**. It detects unclosed
+This lint **warns by default**. It detects unclosed
 or invalid HTML tags. For example:
 
 ```rust