Bump cachix/install-nix-action from 24 to 25

Bumps [cachix/install-nix-action](https://github.com/cachix/install-nix-action) from 24 to 25.
- [Release notes](https://github.com/cachix/install-nix-action/releases)
- [Commits](cachix/install-nix-action@v24...v25)

---
updated-dependencies:
- dependency-name: cachix/install-nix-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/CI_NixPy.yml

@@ -20,7 +20,7 @@ jobs:
         fetch-depth: 1
 
     - name: Install/Setup - NIX
-      uses: cachix/install-nix-action@v24
+      uses: cachix/install-nix-action@v25
       with:
         nix_path: nixpkgs=channel:nixos-unstable
         extra_nix_config: |
@@ -50,7 +50,7 @@ jobs:
         fetch-depth: 1
 
     - name: Install/Setup - NIX
-      uses: cachix/install-nix-action@v24
+      uses: cachix/install-nix-action@v25
       with:
         nix_path: nixpkgs=channel:nixos-unstable
         extra_nix_config: |
@@ -72,7 +72,7 @@ jobs:
         fetch-depth: 1
 
     - name: Install/Setup - NIX
-      uses: cachix/install-nix-action@v24
+      uses: cachix/install-nix-action@v25
       with:
         nix_path: nixpkgs=channel:nixos-unstable
         extra_nix_config: |
@@ -94,7 +94,7 @@ jobs:
   #       fetch-depth: 1
 
   #   - name: Install/Setup - NIX
-  #     uses: cachix/install-nix-action@v24
+  #     uses: cachix/install-nix-action@v25
   #     with:
   #       nix_path: nixpkgs=channel:nixos-unstable
   #       extra_nix_config: |