Merge pull request #578 from NixOS/renovate/cachix-install-nix-action-31.x

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

Author: mweinelt

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
           - macos-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v30
+      - uses: cachix/install-nix-action@v31
       - uses: cachix/cachix-action@v15
         with:
           name: nixos-infra-dev
@@ -45,7 +45,7 @@ jobs:
           - mimas
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v30
+      - uses: cachix/install-nix-action@v31
       - uses: cachix/cachix-action@v15
         with:
           name: nixos-infra-dev
@@ -61,7 +61,7 @@ jobs:
           - goofy-hopcroft
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v30
+      - uses: cachix/install-nix-action@v31
       - uses: cachix/cachix-action@v15
         with:
           name: nixos-infra-dev
@@ -77,7 +77,7 @@ jobs:
           - m2-large
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v30
+      - uses: cachix/install-nix-action@v31
       - uses: cachix/cachix-action@v15
         with:
           name: nixos-infra-dev