CI: update cachix names

Author: Datner

.github/workflows/main.yml

@@ -26,7 +26,7 @@ jobs:
       - name: Cache nix
         uses: cachix/cachix-action@v12
         with:
-          name: react-effect
+          name: datner
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
       - name: Setup direnv
         uses: HatsuneMiku3939/direnv-action@v1

.github/workflows/pr.yml

@@ -27,7 +27,7 @@ jobs:
       - name: Cache nix
         uses: cachix/cachix-action@v12
         with:
-          name: react-effect
+          name: datner
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
       - name: Setup direnv
         uses: HatsuneMiku3939/direnv-action@v1