ANN: C-Blosc2 3.1.5 released

[Francesc Alted]

# Announcing C-Blosc2 3.1.5
A fast, compressed, and persistent binary data store library for C.

## What is new?

This is a maintenance release that fixes the decompression of all-zeros
buffers whose length is not a multiple of ``typesize``.  Such chunks were
previously rejected even though all-zeros decompression is just a ``memset``
and works regardless of element alignment.  This affected, for example,
python-blosc2's ``compress2`` → ``decompress2`` round-trip for all-zeros
payloads with a length not divisible by the type size.

This release introduces no API/ABI changes.

For more info, see the release notes in:

https://github.com/Blosc/c-blosc2/blob/main/RELEASE_NOTES.md

## What is it?

Blosc2 is a high-performance data container optimized for binary data.
Blosc2 is the next generation of Blosc, an
[award-winning library](https://www.blosc.org/posts/prize-push-Blosc2)
that has been around for more than a decade.

Blosc2 expands the capabilities of Blosc by providing a higher level
container that is able to store many chunks on it (hence the super-block name).
It supports storing data on both memory and disk using the same API.
Also, it adds more compressors and filters.

## Download sources

The github repository is over here:

https://github.com/Blosc/c-blosc2

Blosc is distributed using the BSD license, see LICENSE.txt
for details.

## Mailing list

There is an official Blosc mailing list at:

bl...@googlegroups.com
https://groups.google.com/g/blosc


Enjoy Data!
- The Blosc Development Team