GH Actions: few small workflow tweaks

* Remove some information from a step name which is already in a comment above it.
* Fold two steps into one (Composer install).
* Add a missing condition to prevent a step from running when it is not needed.

.github/workflows/test.yml

@@ -110,7 +110,7 @@ jobs:
           tools: cs2pr
 
       # This action also handles the caching of the dependencies.
-      - name: Set up node and enable caching of dependencies
+      - name: Set up node
         uses: actions/setup-node@v4
         with:
           node-version: '20'
@@ -125,18 +125,9 @@ jobs:
       # Install dependencies and handle caching in one go.
       # @link https://github.com/marketplace/actions/install-php-dependencies-with-composer
       - name: Install Composer dependencies
-        if: ${{ matrix.php != '8.4' }}
         uses: "ramsey/composer-install@v2"
         with:
-          # Bust the cache at least once a month - output format: YYYY-MM.
-          custom-cache-suffix: $(date -u "+%Y-%m")
-
-      # For PHP "nightly", we install with ignore platform reqs.
-      - name: Install Composer dependencies - with ignore platform
-        if: ${{ matrix.php == '8.4' }}
-        uses: "ramsey/composer-install@v2"
-        with:
-          composer-options: --ignore-platform-req=php
+          composer-options: ${{ matrix.php == '8.4' && '--ignore-platform-req=php' || '' }}
           custom-cache-suffix: $(date -u "+%Y-%m")
 
       # Note: The code style check is run multiple times against every PHP version
@@ -161,6 +152,7 @@ jobs:
         run: cs2pr ./phpcs-report.xml
 
       - name: Download the PHPCS phar
+        if: ${{ matrix.custom_ini == false }}
         uses: actions/download-artifact@v3
         with:
           name: phpcs-phar