flake.lock: Update

Flake lock file updates:

• Updated input 'fenix':
    'github:nix-community/fenix/ea96690b28eb5a859d28bcf02887a26e3854e4f3?narHash=sha256-CciuT/8HI/BR%2By%2BW2/FyHRDpchbKQ9wA8ABJiio0CE8%3D' (2024-10-12)
  → 'github:nix-community/fenix/7d9ba794daf5e8cc7ee728859bc688d8e26d5f06?narHash=sha256-sVuLDQ2UIWfXUBbctzrZrXM2X05YjX08K7XHMztt36E%3D' (2025-03-20)
• Updated input 'fenix/nixpkgs':
    'github:nixos/nixpkgs/5633bcff0c6162b9e4b5f1264264611e950c8ec7?narHash=sha256-9UTxR8eukdg%2BXZeHgxW5hQA9fIKHsKCdOIUycTryeVw%3D' (2024-10-09)
  → 'github:nixos/nixpkgs/b6eaf97c6960d97350c584de1b6dcff03c9daf42?narHash=sha256-Txwa5uO%2BqpQXrNG4eumPSD%2BhHzzYi/CdaM80M9XRLCo%3D' (2025-03-18)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/0fb804acb375b02a3beeaceeb75b71969ef37b15?narHash=sha256-QFPMazeiGLo7AGy4RREmTgko0Quch/toMVKhGUjDEeo%3D' (2024-10-09)
  → 'github:rust-lang/rust-analyzer/15d87419f1a123d8f888d608129c3ce3ff8f13d4?narHash=sha256-gCpvEQOrugHWLimD1wTFOJHagnSEP6VYBDspq96Idu0%3D' (2025-03-18)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/5633bcff0c6162b9e4b5f1264264611e950c8ec7?narHash=sha256-9UTxR8eukdg%2BXZeHgxW5hQA9fIKHsKCdOIUycTryeVw%3D' (2024-10-09)
  → 'github:NixOS/nixpkgs/42a1c966be226125b48c384171c44c651c236c22?narHash=sha256-rpqepOZ8Eo1zg%2BKJeWoq1HAOgoMCDloqv5r2EAa9TSA%3D' (2025-04-05)

Author: themorpheustuts