cuda: update CHANGELOG wrt new setpts API

CHANGELOG

@@ -22,6 +22,14 @@ If not stated, FINUFFT is assumed (cuFINUFFT <=1.3 is listed separately).
   Created a .clang-format file to define the style similar to the existing style.
   Applied clang-format to all cmake, C, C++, and CUDA code. Ignored the blame
   using .git-blame-ignore-revs. Added a contributing.md for developers.
+* cuFINUFFT interface update: number of nonuniform points M is now a 64-bit integer
+as opposed to 32-bit. While this does modify the ABI, most code will just need to
+recompile against the new library as compilers will silently upcast any 32-bit
+integers to 64-bit when calling cufinufft(f)_setpts. Note that internally, 32-bit
+integers are still used, so calling cufinufft with more than 2e9 points will fail.
+This restriction may be listed in the future.
+
+>>>>>>> 3d9f5a2e (cuda: update CHANGELOG wrt new setpts API)
 
 V 2.2.0 (12/12/23)