build(deps): bump the build-dependencies group in /build with 2 updates

Bumps the build-dependencies group in /build with 2 updates: [build](https://github.com/pypa/build) and [tox](https://github.com/tox-dev/tox).


Updates `build` from 1.2.2 to 1.2.2.post1
- [Release notes](https://github.com/pypa/build/releases)
- [Changelog](https://github.com/pypa/build/blob/main/CHANGELOG.rst)
- [Commits](pypa/build@1.2.2...1.2.2.post1)

Updates `tox` from 4.20.0 to 4.21.2
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/main/docs/changelog.rst)
- [Commits](tox-dev/tox@4.20.0...4.21.2)

---
updated-dependencies:
- dependency-name: build
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: build-dependencies
- dependency-name: tox
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: build-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>

build/build-constraints.txt

@@ -1,7 +1,7 @@
 # these packages are used as constraints during build
-build==1.2.2
+build==1.2.2.post1
 hatchling==1.25.0
 
 # These packages are used used as constraints in workflows
-tox==4.20.0
+tox==4.21.2
 pip-tools==7.4.1