chore: add artifacts/ to .gitignore

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: sharpninja

.gitignore

@@ -10,6 +10,7 @@ docs/EXCEPTION-EVALUATION.md
 .nuget/
 .github/scripts/__pycache__/
 publish/
+artifacts/
 
 # PNGs outside of Assets / Resources / docs
 *.png