chore(flake): update inputs

Includes GNOME 42 update and changes to get its new dark mode and
pop-shell working.

flake.lock

@@ -22,11 +22,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1648283590,
-        "narHash": "sha256-OjoAiY2XWr2ah73rY+kvEYLF+q40S/X61tUC0JPuCKw=",
+        "lastModified": 1648366999,
+        "narHash": "sha256-Sdm0lI2ZBc70EnMMmvfDVY7gIM3M4c2L86EdQ9tKRE4=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "8afee75d0d1cb054cfeddfdc9f7193adc7741c95",
+        "rev": "888eac32bd657bfe0d024c8770130d80d1c02cd3",
         "type": "github"
       },
       "original": {
@@ -54,11 +54,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1648069223,
-        "narHash": "sha256-BXzQV8p/RR440EB9qY0ULYfTH0zSW1stjUCYeP4SF+E=",
+        "lastModified": 1648390671,
+        "narHash": "sha256-u69opCeHUx3CsdIerD0wVSR+DjfDQjnztObqfk9Trqc=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "1d08ea2bd83abef174fb43cbfb8a856b8ef2ce26",
+        "rev": "ce8cbe3c01fd8ee2de526ccd84bbf9b82397a510",
         "type": "github"
       },
       "original": {
@@ -70,11 +70,11 @@
     },
     "nur": {
       "locked": {
-        "lastModified": 1648289973,
-        "narHash": "sha256-OFLCWNigShbl0mxYeOjiqs8MWH5JGcWm6GGMyvA0OO0=",
+        "lastModified": 1648575985,
+        "narHash": "sha256-p847S32OOIuN62cSd3F+FJvEQtpSTgB1VwwmY8j7CY0=",
         "owner": "nix-community",
         "repo": "NUR",
-        "rev": "526d47ce95bd4d5e041a4fd3ffb831183d8654fe",
+        "rev": "94582ade540272b91e4075cd05c100ff44ce8986",
         "type": "github"
       },
       "original": {