9.0.1 with catalog 2510 release and fix for use of publicKey

What's Changed

• fix: use actions version 4 for correct handling of signing keys and update apax image by @ReinerSchinkoethe in #31
• fix: bring using and fix of publickey to release v9 by @ReinerSchinkoethe in #32

Full Changelog: 9.0.0...9.0.1