* [zeromq] Download patch files for GitHub PRs
This is needed to have a stable checksum for the patches because GitHub
is returning a different checksum for the patches now because the index
objects are abbreviated to 9 characters instead of 10 characters, e.g.
for patch4311:
```diff
+ index 24cce83d1..c6d625188 100644
- index 24cce83d11..c6d625188d 100644
```
Reported at <https://github.com/microsoft/vcpkg/pull/22681#issuecomment-1061312320>.
A possible long-term fix is reported to GitHub at
<https://github.com/github/feedback/discussions/12531>.
* [zeromq] Update version
