Nix: update waybar-hyprland, add hyprland-nvidia (#1409)

Also add them to CI

.github/workflows/nix-build.yaml

@@ -10,6 +10,7 @@ jobs:
         package:
         - default
         - hyprland-no-hidpi
+        - hyprland-nvidia
         - xdg-desktop-portal-hyprland
     steps:
     - name: Clone repository

.github/workflows/nix-update.yaml

@@ -17,6 +17,12 @@ jobs:
           experimental-features = nix-command flakes
     - name: Update lockfile
       run: nix/update-inputs.sh
+    - uses: cachix/cachix-action@v12
+      with:
+        name: hyprland
+        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+    - name: Build Waybar-Hyprland
+      run: nix build .#waybar-hyprland --print-build-logs
     - uses: stefanzweifel/git-auto-commit-action@v4
       with:
         commit_message: "[gha] bump flake inputs"