flake.lock: Update

Flake lock file updates:

• Updated input 'firefox-gnome-theme':
    'github:rafaelmardojai/firefox-gnome-theme/a78d6f51783b844264181708e6a5201893d03be6' (2023-07-16)
  → 'github:rafaelmardojai/firefox-gnome-theme/6c4190fbbf320569cc546a73efd25380d92fdd91' (2023-07-18)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/f64b9738da8e86195766147e9752c67fccee006c' (2023-07-16)
  → 'github:NixOS/nixpkgs/08700de174bc6235043cb4263b643b721d936bdb' (2023-07-18)

flake.lock

@@ -3,11 +3,11 @@
     "firefox-gnome-theme": {
       "flake": false,
       "locked": {
-        "lastModified": 1689482348,
-        "narHash": "sha256-w3cIvSDSFqHtSdRbg1kePqR+SBUAAWQh4oDSrLh0Oxs=",
+        "lastModified": 1689695256,
+        "narHash": "sha256-rAM6kNwHxT/YK58eC62vpcgf7i73ffBg8EHz3NoaAog=",
         "owner": "rafaelmardojai",
         "repo": "firefox-gnome-theme",
-        "rev": "d1edc1d0722ea3685bb3482c0e8dc17df884613a",
+        "rev": "6c4190fbbf320569cc546a73efd25380d92fdd91",
         "type": "github"
       },
       "original": {
@@ -39,11 +39,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1689431009,
-        "narHash": "sha256-hPgQCRWP5q/Xc4qOIP3c2krR9nQua78+t9EDiuey5nc=",
+        "lastModified": 1689680872,
+        "narHash": "sha256-brNix2+ihJSzCiKwLafbyejrHJZUP0Fy6z5+xMOC27M=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "af8279f65fe71ce5a448408034a8c06e2b4b2c66",
+        "rev": "08700de174bc6235043cb4263b643b721d936bdb",
         "type": "github"
       },
       "original": {