Update change note wording

Co-authored-by: Chris Smowton <smowton@github.com>

Author: owen-mc

go/ql/lib/change-notes/2024-04-06-type-switch-implicitly-declared-variables.md

@@ -1,4 +1,4 @@
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 category: minorAnalysis
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-* Data flow through variables declared in statements of the form `x := y.(type)` at the beginning of type switches was not being followed. This has now been fixed, which may result in more alerts.
+* Data flow through variables declared in statements of the form `x := y.(type)` at the beginning of type switches has been fixed, which may result in more alerts.