ci: clearly name steps in update.yml

Author: flexiondotorg

.github/workflows/update.yml

@@ -8,9 +8,13 @@ jobs:
   lockfile:
     runs-on: ubuntu-22.04
     steps:
-      - name: Update flake.lock
+      - name: Checkout
         uses: actions/checkout@v3
-      - uses: DeterminateSystems/nix-installer-action@main
-      - uses: DeterminateSystems/magic-nix-cache-action@main
-      - uses: DeterminateSystems/flake-checker-action@main
-      - uses: ./.
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@main
+      - name: Enable magic Nix cache
+        uses: DeterminateSystems/magic-nix-cache-action@main
+      - name: Check flake
+        uses: DeterminateSystems/flake-checker-action@main
+      - name: Update flake.lock
+        uses: ./.