Bump DeterminateSystems/nix-installer-action from 12 to 13

Bumps [DeterminateSystems/nix-installer-action](https://github.com/determinatesystems/nix-installer-action) from 12 to 13.
- [Release notes](https://github.com/determinatesystems/nix-installer-action/releases)
- [Commits](https://github.com/determinatesystems/nix-installer-action/compare/v12...v13)

---
updated-dependencies:
- dependency-name: DeterminateSystems/nix-installer-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/build.yml

@@ -32,7 +32,7 @@ jobs:
 
       # - uses: ./.github/actions/clean-disk
 
-      - uses: DeterminateSystems/nix-installer-action@v12
+      - uses: DeterminateSystems/nix-installer-action@v13
         with:
           extra-conf: |
             accept-flake-config = true

.github/workflows/update.yml

@@ -19,7 +19,7 @@ jobs:
 
       - run: git checkout -B flake-lock
 
-      - uses: DeterminateSystems/nix-installer-action@v12
+      - uses: DeterminateSystems/nix-installer-action@v13
         with:
           extra-conf: |
             accept-flake-config = true
@@ -68,7 +68,7 @@ jobs:
         with:
           fetch-depth: 0
 
-      - uses: DeterminateSystems/nix-installer-action@v12
+      - uses: DeterminateSystems/nix-installer-action@v13
         with:
           extra-conf: |
             accept-flake-config = true