Merge pull request #1078 from BitGo/dependabot/github_actions/DeterminateSystems/nix-installer-action-21

chore(deps): bump DeterminateSystems/nix-installer-action from 20 to 21

Author: ericcrosson-bitgo

.github/workflows/format.yaml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@786fff0690178f1234e4e1fe9b536e94f5433196 # v20
+        uses: DeterminateSystems/nix-installer-action@c5a866b6ab867e88becbed4467b93592bce69f8a # v21
 
       - name: Checkout
         uses: actions/checkout@v4