Update cachix/install-nix-action digest to ab73962

.github/workflows/check-nix-format.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Calculate changed files
         id: changed-files
         run: echo "changed_files=$(git diff --name-only -r HEAD^1 HEAD | xargs)" >> $GITHUB_OUTPUT
-      - uses: cachix/install-nix-action@4e002c8ec80594ecd40e759629461e26c8abed15 # v31
+      - uses: cachix/install-nix-action@ab739621df7a23f52766f9ccc97f38da6b7af14f # v31
         with:
           extra_nix_config: sandbox = true
           nix_path: nixpkgs=channel:nixpkgs-unstable

.github/workflows/pr.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5
-    - uses: cachix/install-nix-action@4e002c8ec80594ecd40e759629461e26c8abed15 # v31
+    - uses: cachix/install-nix-action@ab739621df7a23f52766f9ccc97f38da6b7af14f # v31
       with:
         nix_path: nixpkgs=channel:nixos-unstable
         extra_nix_config: |

.github/workflows/update.yml

@@ -24,7 +24,7 @@ jobs:
         permissions: "contents:write"
         revoke_token: true
     - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5
-    - uses: cachix/install-nix-action@4e002c8ec80594ecd40e759629461e26c8abed15 # v31
+    - uses: cachix/install-nix-action@ab739621df7a23f52766f9ccc97f38da6b7af14f # v31
       with:
         nix_path: nixpkgs=channel:nixos-unstable
         extra_nix_config: |