Add change note

Author: owen-mc

go/ql/lib/change-notes/2026-09-09-go-1.27-models.md

@@ -0,0 +1,7 @@
+---
+category: minorAnalysis
+---
+* Added or improved data flow models for the following Go standard-library APIs introduced or updated in Go 1.27:
+	* `bytes.CutLast`, `database/sql.ConvertAssign`, `database/sql/driver.RowsColumnScanner.ScanColumn`, `net/url.URL.Clone`, `net/url.Values.Clone` and `strings.CutLast`.
+	* The new `encoding/json/jsontext` package.
+* Added more data flow models for the `strings` package: `strings.Clone`, `Cut`, `CutPrefix`, `CutSuffix`, `Fields`, `FieldsFunc`, and `Join`; `strings.Builder.String`, `Builder.WriteByte`, and `Builder.WriteRune`; `strings.Reader.ReadByte` and `Reader.ReadRune`; and `strings.Replacer.Replace` and `Replacer.WriteString`.