Bump cachix/cachix-action from 12 to 13

Bumps [cachix/cachix-action](https://github.com/cachix/cachix-action) from 12 to 13.
- [Release notes](https://github.com/cachix/cachix-action/releases)
- [Commits](cachix/cachix-action@v12...v13)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/flake-update-nixpkgs.yml

@@ -18,7 +18,7 @@ jobs:
         with:
           extra_nix_config: |
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
-      - uses: cachix/cachix-action@v12
+      - uses: cachix/cachix-action@v13
         with:
           name: deskodon
           # If you chose API tokens for write access OR if you have a private cache

.github/workflows/flake-update-rust-overlay.yml

@@ -18,7 +18,7 @@ jobs:
         with:
           extra_nix_config: |
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
-      - uses: cachix/cachix-action@v12
+      - uses: cachix/cachix-action@v13
         with:
           name: deskodon
           # If you chose API tokens for write access OR if you have a private cache

.github/workflows/flake.yml

@@ -12,7 +12,7 @@ jobs:
     - uses: cachix/install-nix-action@v23
       with:
         nix_path: nixpkgs=channel:nixos-unstable
-    - uses: cachix/cachix-action@v12
+    - uses: cachix/cachix-action@v13
       with:
         name: config-rs-ng
         # If you chose API tokens for write access OR if you have a private cache
@@ -26,7 +26,7 @@ jobs:
     - uses: cachix/install-nix-action@v23
       with:
         nix_path: nixpkgs=channel:nixos-unstable
-    - uses: cachix/cachix-action@v12
+    - uses: cachix/cachix-action@v13
       with:
         name: config-rs-ng
         # If you chose API tokens for write access OR if you have a private cache