Update actions

Author: stackptr

.github/workflows/ci.yml

@@ -9,10 +9,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: cachix/install-nix-action@v25
+    - uses: cachix/install-nix-action@v31
       with:
         github_access_token: ${{ secrets.GITHUB_TOKEN }}
-    - uses: cachix/cachix-action@v12
+    - uses: cachix/cachix-action@v16
       with:
         name: stackptr
         authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}

.github/workflows/update.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v30
+      - uses: cachix/install-nix-action@v31
       - name: Setup git identity
         run: |
           git config --global user.email "github-actions[bot]@users.noreply.github.com"