Merge pull request github#15793 from github/mbg/go/autobuilder-refactor-changelog

Go: Add changenote for autobuilder refactor

Author: mbg

go/ql/lib/change-notes/2024-03-04-autobuilder-changes.md

@@ -0,0 +1,5 @@
+---
+category: majorAnalysis
+---
+* We have significantly improved the Go autobuilder to understand a greater range of project layouts, which allows Go source files to be analysed that could previously not be processed.
+* Go 1.22 has been included in the range of supported Go versions.