Bump cachix/install-nix-action from v10 to v12

dependabot[bot] · web-flow · commit 2dcdc06e3a41 · 2020-11-09T05:34:56.000Z
Bumps [cachix/install-nix-action](https://github.com/cachix/install-nix-action) from v10 to v12. - [Release notes](https://github.com/cachix/install-nix-action/releases) - [Commits](cachix/install-nix-action@v10...07da252) Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
@@ -9,7 +9,7 @@ jobs:
     - uses: actions/checkout@v2
       with:
         fetch-depth: 0
-    - uses: cachix/install-nix-action@v10
+    - uses: cachix/install-nix-action@v12
     #- run: nix flake check
     - run: nix-build -A checks.x86_64-linux.build
   validate-openapi:
@@ -18,5 +18,5 @@ jobs:
     - uses: actions/checkout@v2
       with:
         fetch-depth: 0
-    - uses: cachix/install-nix-action@v10
+    - uses: cachix/install-nix-action@v12
     - run: nix-shell -p openapi-generator-cli --run "openapi-generator-cli validate -i ./hydra-api.yaml"
