build(deps): bump httpx in /resources/roles/dns/files

Bumps [httpx](https://github.com/encode/httpx) from 0.27.2 to 0.28.1.
- [Release notes](https://github.com/encode/httpx/releases)
- [Changelog](https://github.com/encode/httpx/blob/master/CHANGELOG.md)
- [Commits](encode/httpx@0.27.2...0.28.1)

---
updated-dependencies:
- dependency-name: httpx
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

resources/roles/dns/files/requirements.txt

@@ -1,4 +1,4 @@
 requests==2.32.3
 cloudflare==3.1.1
 pydantic==2.9.2 # Temporary fix until 2.10 issues are resolved
-httpx==0.27.2 # Lock version per salty
+httpx==0.28.1 # Lock version per salty