piwheel builds fail, causing uninstallability on raspberry pi's.

**Describe the bug**
blosc2 doesn't provide wheels for armhf.
A reliable workaround for this is to rely on piwheels, which provides pre-built wheels for most popular packages.

This worked fine for blosc2==2 - but fails for blosc2==3, as they fail to build these wheels

**To Reproduce**

Look at the logs on [piwheels](https://www.piwheels.org/project/blosc2/)
Analyze the comment from @bennuttall about what the issue with the piwheels build is [here](https://github.com/piwheels/packages/issues/492#issuecomment-2557875595) - which essentially seems to be that blosc2 is downloaded from github.

**Expected behavior**
Either provide wheels for raspberry on pypi 3.9 and 3.11 should do - or help fix the issue with piwheels building.

**Desktop (please complete the following information):**
- OS: [e.g. iOS] raspbian
- Version [e.g. 22]

Inizia con i log del progetto piwheels per blosc2 e il commento piwheels collegato relativo al download da GitHub. Determina se la configurazione del pacchetto o gli artefatti della release impediscono a piwheels di compilare blosc2 versione 3 per armhf. Il lavoro è considerato completato quando gli utenti Raspberry Pi possono installare una versione supportata di blosc2 tramite un wheel disponibile oppure la build di piwheels riesce.

Scritto dal modello di indicizzazione a partire dal testo della issue.