Add change note

ruby/ql/lib/change-notes/2024-01-05-division-newline.md

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+category: minorAnalysis
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+* Parsing of division operators (`/`) at the end of a line has been improved. Before they were wrongly interpreted as the start of a regular expression literal (`/.../`) leading to syntax errors.
+* Parsing of `case` statements that are formatted with the value expression on a different line than the `case` keyword  has been improved and should no longer lead to syntax errors.