newsHeader: "NumPy 2.0 release date: June 16"

_23 May, 2024_ -- We are excited to announce that NumPy 2.0 is planned to be released on June 16, 2024. This release has been over a year in the making, and is the first major release since 2006. Importantly, in addition to many new features and performance improvement, it contains **breaking changes** to the ABI as well as the Python and C APIs. It is likely that downstream packages and end user code needs to be adapted - if you can, please verify whether your code works with NumPy `2.0.0rc2`. **Please see the following for more details:**

- The [NumPy 2.0 migration guide](https://numpy.org/devdocs/numpy_2_0_migration_guide.html)

- The [2.0.0 release notes](https://numpy.org/devdocs/release/2.0.0-notes.html)

- Announcement issue for status updates: [numpy#24300](https://github.com/numpy/numpy/issues/24300)