Update nix_macos_x86_64.yml

fixes: Could not set environment: 150: Operation not permitted while System Integrity Protection is engaged
see also: cachix/install-nix-action#183

Signed-off-by: Anton-4 <17049058+Anton-4@users.noreply.github.com>

.github/workflows/nix_macos_x86_64.yml

@@ -19,7 +19,7 @@ jobs:
         with:
           clean: "true"
 
-      - uses: cachix/install-nix-action@v20
+      - uses: cachix/install-nix-action@v22
 
       - name: execute cli_run tests only, the full tests take too long but are run nightly
         run: nix develop -c cargo test --locked --release -p roc_cli