develop/flake.nix: nix flake update

develop/flake.lock

@@ -609,11 +609,11 @@
         "horizon-shell": "horizon-shell"
       },
       "locked": {
-        "lastModified": 1707163979,
-        "narHash": "sha256-FNigtnkmNpGn+senNw4Q0nglivXlqNGohwdhwunlX70=",
+        "lastModified": 1707581045,
+        "narHash": "sha256-lo1mKVW/b5zIuDI1pXTKBGlfdnAeK7JoYPO2GDkbipY=",
         "ref": "refs/heads/master",
-        "rev": "4e8095dda83ba54a8b53f688473869bc759a5772",
-        "revCount": 33,
+        "rev": "42dfc0c2d8fdecc830a2065d03667bc55ce477fd",
+        "revCount": 34,
         "type": "git",
         "url": "https://gitlab.horizon-haskell.net/nix/horizon-develop-flake"
       },