C++: Modify change note to be more aligned with existing change notes.

Author: MathiasVP

cpp/ql/src/change-notes/2024-05-19-avoid-reporting-static-variable.md

@@ -1,4 +1,4 @@
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 category: minorAnalysis
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-* Reduce false positives of `NotInitialised.ql`. Static variables are initialised to zeros or nulls by default. See https://stackoverflow.com/questions/13251083/the-initialization-of-static-variables-in-c
+* The "Variable not initialized before use" query (`cpp/not-initialised`) no longer reports an alert on static variables.