fix date-check annotation some more

Author: tshepang

src/doc/rustc-dev-guide/src/rustdoc-internals.md

@@ -108,7 +108,7 @@ Here is the list of passes as of <!-- date-check --> March 2023:
   - `bare_urls` detects links that are not linkified, e.g., in Markdown such as
     `Go to https://example.com/.` It suggests wrapping the link with angle brackets:
     `Go to <https://example.com/>.` to linkify it. This is the code behind the <!--
-    date-check: 2022-05 --> `rustdoc::bare_urls` lint.
+    date-check: may 2022 --> `rustdoc::bare_urls` lint.
 
   - `check_code_block_syntax` validates syntax inside Rust code blocks
     (<code>```rust</code>)