CI: don't auto-update

This pollutes the commit history. Instead, we update the input inside the
check action, so that we have an up to date Hyprland, but don't commit
the change.

.github/workflows/nix-build.yml

@@ -18,4 +18,7 @@ jobs:
       - uses: DeterminateSystems/nix-installer-action@main
       - uses: DeterminateSystems/magic-nix-cache-action@main
 
+      - name: Update inputs
+        run: nix flake update
+
       - run: nix build .#${{ matrix.package }} -L

.github/workflows/nix-update-inputs.yml

@@ -1,28 +0,0 @@
-name: Nix
-
-on:
-  schedule:
-    - cron: '0 0 * * *' # check daily
-
-jobs:
-  update:
-    name: inputs
-    runs-on: ubuntu-latest
-    steps:
-      - name: Clone repository
-        uses: actions/checkout@v3
-        with:
-          token: ${{ secrets.PAT }}
-
-      - uses: DeterminateSystems/nix-installer-action@main
-      - name: Update inputs
-        run: nix flake update
-
-      - name: Commit
-        uses: stefanzweifel/git-auto-commit-action@v4
-        with:
-          commit_message: "[gha] Nix: update inputs"
-
-  update-build:
-    needs: update
-    uses: ./.github/workflows/nix-build.yml