fix typo in change-note

Co-authored-by: Tony Torralba <[email protected]>

Author: erik-krogh

java/ql/src/change-notes/2022-08-29-remove-security-tag.md

@@ -1,4 +1,4 @@
 ---
 category: queryMetadata
 ---
-* Removed the `security` tag from several queries not in the `Security/` folder that also had missing `@security-severity` tags.
+* Removed the `@security-severity` tag from several queries not in the `Security/` folder that also had missing `security` tags.