add changelog fragment

RedKinda · RedKinda · commit 1714786e58db · 2025-10-21T18:16:10.000+02:00
diff --git a/newsfragments/5421.added.md b/newsfragments/5421.added.md
@@ -0,0 +1 @@
+Implement `auto_new` attribute for `#[pyclass]`

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`@@ -0,0 +1 @@`
	`1`	+Implement `auto_new` attribute for `#[pyclass]`