feat(flake.nix/inputs): Temporary switch from nixos-24.11 to staging-next-24.11

`curl` v8.11.0 was released with a bug that causes `git fetch` (and many
similar commands, including Nix's [fetchers][3]) to fail due to failure to parse
`.netrc` files. Luckily, after the bug was [reported upstream][1], a fix was quickly
proposed and merged by its main [developer][2]. Not long after, the upstream
`curl` patch was [backported][5] to the Nixpkgs `curl` derivation.

Given that we rely on `.netrc` files this bug is a showstopper for us, so its
important that we switch to the patched `curl` version ASAP. Instead of [waiting
for the build to land][5] on the `nixos-24.11` branch, we will switch directly
to the `staging-next-24.11` branch, which already includes the fix.

[1]: curl/curl#15496
[2]: curl/curl@f5c6169
[3]: NixOS/nixpkgs#356114
[4]: NixOS/nixpkgs#356133
[5]: https://nixpk.gs/pr-tracker.html?pr=356660

Author: PetarKirov

flake.lock

@@ -15,7 +15,10 @@
   inputs = {
     nixos-2311.url = "github:NixOS/nixpkgs/nixos-23.11";
     nixos-2405.url = "github:NixOS/nixpkgs/nixos-24.05";
-    nixos-2411.url = "github:NixOS/nixpkgs/nixos-24.11";
+
+    # FIXME: change back to `nixos-24.11` once
+    # https://nixpk.gs/pr-tracker.html?pr=356660 is all green
+    nixos-2411.url = "github:NixOS/nixpkgs/staging-next-24.11";
 
     nixpkgs.follows = "nixos-2411";
     nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";