expand change-note

Co-authored-by: Tony Torralba <atorralba@users.noreply.github.com>

Author: erik-krogh

java/ql/lib/change-notes/2024-03-12-request-sanitizers.md

@@ -1,4 +1,4 @@
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 category: minorAnalysis
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-* Added sanitizers for relative URLs, `List.contains()`, and checking the host on an URI to the `java/ssrf` query.
+* Added sanitizers for relative URLs, `List.contains()`, and checking the host of a URI to the `java/ssrf` and `java/unvalidated-url-redirection` queries.