chore(deps): update nixpkgs to nixos-23.11 (#98)

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This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [nixpkgs](https://togithub.com/NixOS/nixpkgs) | minor | `nixos-23.05`
-> `nixos-23.11` |

---

### Release Notes

<details>
<summary>NixOS/nixpkgs (nixpkgs)</summary>

###
[`vnixos-23.11`](https://togithub.com/NixOS/nixpkgs/compare/nixos-23.05...nixos-23.11)

[Compare
Source](https://togithub.com/NixOS/nixpkgs/compare/nixos-23.05...nixos-23.11)

</details>

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template/flake.nix

@@ -1,6 +1,6 @@
 {
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
     nixpkgs-ruby.url = "github:bobvanderlinden/nixpkgs-ruby";
     nixpkgs-ruby.inputs.nixpkgs.follows = "nixpkgs";
     flake-utils.url = "github:numtide/flake-utils";