pkgs/top-level/release: cache openssl-1.1.1u instead of openssl-1.1.1t

[RaitoBezarius]

Description of changes

We were caching this insecure package as part of a decision during 23.05, we will now cache openssl-1.1.1u too as this is now the de-facto OpenSSL package on 23.05, which is EOL.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 23.11 Release Notes (or backporting 23.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

[vcunat]

Perhaps add a comment into the openssl expression, so that it doesn't diverge again in case another update happens in future?

[github-actions]

Successfully created backport PR for release-23.05:

• [Backport release-23.05] pkgs/top-level/release: cache openssl-1.1.1u instead of openssl-1.1.1t #238533