Update keyring requirement from <25,>=20 to >=20,<26

Updates the requirements on [keyring](https://github.com/jaraco/keyring) to permit the latest version.
- [Release notes](https://github.com/jaraco/keyring/releases)
- [Changelog](https://github.com/jaraco/keyring/blob/main/NEWS.rst)
- [Commits](jaraco/keyring@v20.0.0...v25.0.0)

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

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

requirements-release.txt

@@ -1,4 +1,4 @@
 build
 bump2version>=1,<2
-keyring>=20,<25
+keyring>=20,<26
 twine>=3,<5