chore(deps): update setuptools requirement from ~=70.1.1 to ~=70.3.0

Updates the requirements on [setuptools](https://github.com/pypa/setuptools) to permit the latest version.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/main/NEWS.rst)
- [Commits](pypa/setuptools@v70.1.1...v70.3.0)

---
updated-dependencies:
- dependency-name: setuptools
  dependency-type: direct:production
...

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

requirements.txt

@@ -1,5 +1,5 @@
 aiosmtpd~=1.4.6
-setuptools~=70.1.1
+setuptools~=70.3.0
 requests~=2.32.3
 pyyaml~=6.0
 pyOpenSSL~=24.1.0