build(deps): update flake.lock (#5498)

* flake.lock: Update

Flake lock file updates:

• Updated input 'devenv':
    'github:cachix/devenv/e30eb49258bee68353bd9c619823f635f4afa86c?narHash=sha256-Fi7lW%2Bsg1ChduOOQRBCK5JeA1cw4x5wSjIJcppRGGqQ%3D' (2026-07-03)
  → 'github:cachix/devenv/d1fb321e73048d0e1e2b523580268ebb3df2ae90?narHash=sha256-jNjKlmrejUrBgVAeiavlMLlkmC7ZEv1D9nhfuwMW5Q8%3D' (2026-07-08)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/95ca1e203c0750115fd4a6f17d5a245dfe6b1edd?narHash=sha256-JC9PjqKYG9ve5U8aDOLQipp3%2BKLANBHUvGdLZlxzdKI%3D' (2026-06-30)
  → 'github:NixOS/nixpkgs/74cc63f702f7d60a557e152a57b40fb1fd0f72ac?narHash=sha256-0XnckG4ZhBmAsYa9mLuEIFowBG0fDGPLHduQGsbMS4A%3D' (2026-07-08)

* docs: update changelog

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Jakob Lichterfeld <jakob-lichterfeld@gmx.de>

Author: github-actions[bot]

CHANGELOG.md

@@ -44,6 +44,7 @@
 - build(deps): update flake.lock (#5477)
 - ci: sign published images with SLSA provenance + SBOM attestations (#5380 - @oivindoh)
 - fix(ci): add artifact-metadata permission for workflows as it is essential for generating attestations (#5484 - @JakobLichterfeld)
+- build(deps): update flake.lock (#5498)
 
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