flake: update extra-container

Adds support for NixOS 24.11

Author: erikarvstedt

flake.lock

@@ -9,7 +9,7 @@
     nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
     flake-utils.url = "github:numtide/flake-utils";
     extra-container = {
-      url = "github:erikarvstedt/extra-container";
+      url = "github:erikarvstedt/extra-container/0.13";
       inputs.nixpkgs.follows = "nixpkgs";
       inputs.flake-utils.follows = "flake-utils";
     };

flake.nix

@@ -1,7 +1,7 @@
 containerBin=$(type -P extra-container) || true
-if [[ ! ($containerBin && $(realpath "$containerBin") == *extra-container-0.12*) ]]; then
+if [[ ! ($containerBin && $(realpath "$containerBin") == *extra-container-0.13*) ]]; then
     echo
-    echo "Building extra-container. Skip this step by adding extra-container 0.12 to PATH."
+    echo "Building extra-container. Skip this step by adding extra-container 0.13 to PATH."
     nix build --out-link /tmp/extra-container "${BASH_SOURCE[0]%/*}"/../..#extra-container
     # When this script is run as root, e.g. when run in an extra-container shell,
     # chown the gcroot symlink to the regular (login) user so that the symlink can be