chore(deps): update cachix/install-nix-action action to v31.10.7

Author: renovate[bot]

.github/workflows/CI.yml

@@ -18,7 +18,7 @@ jobs:
         uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           persist-credentials: false
-      - uses: cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31.10.6
+      - uses: cachix/install-nix-action@a49548c11d9846ad46ecc0115273879b045f001c # v31.10.7
       - name: Build
         run: nix-shell --pure --run 'treefmt --ci'
   build_warning_nix:
@@ -29,7 +29,7 @@ jobs:
         uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
         with:
           persist-credentials: false
-      - uses: cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31.10.6
+      - uses: cachix/install-nix-action@a49548c11d9846ad46ecc0115273879b045f001c # v31.10.7
       - name: Build
         run: nix-shell --pure --run 'make SPHINXOPTS='-W' html'
   build_docker_image_theme_online_docs: