chore(deps): bump actions/checkout from 6 to 7

Bumps [actions/checkout](https://github.com/actions/checkout) from 6 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/test-per-system.yml

@@ -24,7 +24,7 @@ jobs:
   simple-build:
     runs-on: ${{ inputs.runs-on }}
     steps:
-    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+    - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
     - name: Install Nix
       uses: ./
       with:
@@ -40,7 +40,7 @@ jobs:
   custom-nix-path:
     runs-on: ${{ inputs.runs-on }}
     steps:
-    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+    - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
     - name: Install Nix
       uses: ./
       with:
@@ -51,7 +51,7 @@ jobs:
   extra-nix-config:
     runs-on: ${{ inputs.runs-on }}
     steps:
-    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+    - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
     - name: Install Nix
       uses: ./
       with:
@@ -64,15 +64,15 @@ jobs:
   flakes:
     runs-on: ${{ inputs.runs-on }}
     steps:
-    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+    - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
     - name: Install Nix
       uses: ./
     - run: nix flake show github:NixOS/nixpkgs
 
   latest-installer:
     runs-on: ${{ inputs.runs-on }}
     steps:
-    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+    - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
     - name: Run NAR server
       run: |
         curl --location https://github.com/cachix/nar-toolbox/releases/download/v0.1.0/nar-toolbox-${{ inputs.system }} -O
@@ -89,7 +89,7 @@ jobs:
   oldest-supported-installer:
     runs-on: ${{ inputs.runs-on }}
     steps:
-    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+    - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
     - name: Install Nix
       uses: ./
       with:

.github/workflows/test.yml

@@ -54,7 +54,7 @@ jobs:
   act-support:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+    - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
     - run: curl https://raw.githubusercontent.com/nektos/act/master/install.sh | sudo bash
     - run: docker pull ghcr.io/catthehacker/ubuntu:js-24.04
     - run: |

.github/workflows/update-nix.yml

@@ -8,7 +8,7 @@ jobs:
   update-nix-releases:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - name: Update nix releases
         env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}