chore(deps): update cachix/install-nix-action action to v31

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v4
-    - uses: cachix/install-nix-action@v30
+    - uses: cachix/install-nix-action@v31
     - uses: cachix/cachix-action@v16
       with:
         name: pre-commit-hooks
@@ -31,7 +31,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v4
-    - uses: cachix/install-nix-action@v30
+    - uses: cachix/install-nix-action@v31
     - uses: cachix/cachix-action@v16
       with:
         name: pre-commit-hooks
@@ -50,7 +50,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v4
-    - uses: cachix/install-nix-action@v30
+    - uses: cachix/install-nix-action@v31
     - uses: cachix/cachix-action@v16
       with:
         name: pre-commit-hooks