build(deps): update flake.lock (#5613)

* flake.lock: Update

Flake lock file updates:

• Updated input 'devenv':
    'github:cachix/devenv/49386681992dd2d8cf41a226b5bd0c558984f7a1?narHash=sha256-rbuRaHNIvv4J59JEualb8xrqFhPBze3QflesC96kY9k%3D' (2026-08-10)
  → 'github:cachix/devenv/1f6bf58a7c2667a87766cadd8ba49100920645ca?narHash=sha256-Ppw7srsW%2B%2B2pCYZfB2CXQAuMjHvlq20txrFobAr9dAo%3D' (2026-08-14)
• Updated input 'devenv/cachix/nixpkgs':
    'github:NixOS/nixpkgs/80bdc1e5ce51f56b19791b52b2901187931f5353?narHash=sha256-QKyJ0QGWBn6r0invrMAK8dmJoBYWoOWy7lN%2BUHzW1jc%3D' (2026-03-04)
  → follows 'devenv/nixpkgs'
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/fcb8fcd6bf2d0adecae5bd491afaaaf8311b758d?narHash=sha256-9BG7OgUWdu0ONDO5X2q6%2BK4bsuBITkX/3W4nNJu1Ito%3D' (2026-08-09)
  → 'github:NixOS/nixpkgs/02e08985a27c65ffd33d434eeb2e660a2e4dc84d?narHash=sha256-QvnceIGTBeDvDd9oCn%2BGvdsnkquliuwbVgpiRH68qaQ%3D' (2026-08-14)

* 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

@@ -15,6 +15,7 @@
 - build(deps): bump tzdata from 1.1.3 to 1.1.4 (#5614 - @mews-se)
 - ci: purge orphaned GHCR attestation referrers (#5622 - @swiffer)
 - test: stop the app in test_helper instead of relying on --no-start (#5615 - @swiffer)
+- build(deps): update flake.lock (#5613)
 
 #### Dashboards