step-agent: 0.67.3 -> 0.69.1

[Srylax]

Closes #541213
adds the missing aarch64 hash.
@NickCao do you know if it is possible to configure nix-update-script to update both of them without a custom update.sh?

Things done

• Built on platform:
  • x86_64-linux
  • aarch64-linux
  • aarch64-darwin
• Tested, as applicable:
  • NixOS tests in nixos/tests.
  • Package tests at passthru.tests.
  • Tests in lib/tests or pkgs/test for functions and "core" functionality.
• Ran nixpkgs-review on this PR. See nixpkgs-review usage.
• Tested basic functionality of all binary files, usually in ./result/bin/.
• Nixpkgs Release Notes
  • Package update: when the change is major or breaking.
• NixOS Release Notes
  • Module addition: when adding a new NixOS module.
  • Module update: when the change is significant.
• Fits CONTRIBUTING.md, pkgs/README.md, maintainers/README.md and other READMEs.
• Follows the automation/AI policy.

[Srylax]

@NixOS/nixpkgs-merge-bot merge

[SuperSandro2000]

something like https://github.com/NixOS/nixpkgs/blob/master/pkgs/by-name/lo/loupe/package.nix#L72-L100 can probably do that

[nixpkgs-ci]

@Srylax wants to merge this PR.

Requirements to merge this PR with @NixOS/nixpkgs-merge-bot merge:

• ✅ PR targets a development branch.
• ✅ PR touches only files of packages in pkgs/by-name/.
• ❌ PR is at least one of:
  • ⬜ Approved by a committer.
  • ⬜ Backported via label.
  • ⬜ Opened by a committer.
  • ⬜ Opened by @r-ryantm.
• ✅ PR is not a draft
• ✅ PR is not blocked by a "changes requested" review from a committer.
• ✅ Srylax is a member of @NixOS/nixpkgs-maintainers.
• ✅ Srylax is a maintainer of all touched packages on the master branch.

❌ Pull Request could not be merged (#305350)

[Srylax]

@SuperSandro2000 I found a way with nix-update. Is it acceptable this way?