Add changelog entries for 2.1.1

Author: asmeurer

docs/changelog.md

@@ -1,9 +1,22 @@
 # Changelog
 
+## 2.1.1 (2024-11-06)
+
+### Minor Changes
+
+- Use a more robust implementation of `clip()` that handles corner cases better.
+
+- Fix the definition of `sign()` for complex numbers when using NumPy 1.x.
+
+- Correctly use the array's device when promoting scalars. (Thanks to
+  [@betatim](https://github.com/betatim))
+
+- Correctly propagate the input array's device in `asarray()`. (Thanks to
+  [@betatim](https://github.com/betatim))
 
 ## 2.1 (2024-10-18)
 
-## Major Changes
+### Major Changes
 
 - The default version of the array API standard is now 2023.12. 2022.12 can
   still be enabled via the [flags API](array-api-strict-flags).