GH Actions: various other small tweaks

* Ensure all steps have a name.
* Update a few links in inline comments as the old URLs are no longer valid.
* Fix a non-LF line ending.
* Small indentation fix.
* Be more specific about what Composer can ignore when installing.
    Ref: https://blog.packagist.com/composer-2-2/#-ignore-platform-req-improvements

.github/workflows/label-new-prs.yml

@@ -12,6 +12,6 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: srvaroa/labeler@master
-      env:
-        GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+      - uses: srvaroa/labeler@master
+        env:
+          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"

.github/workflows/phpstan.yml

@@ -35,7 +35,7 @@ jobs:
 
       # Install dependencies and handle caching in one go.
       # Dependencies need to be installed to make sure the PHPUnit classes are recognized.
-      # @link https://github.com/marketplace/actions/install-composer-dependencies
+      # @link https://github.com/marketplace/actions/install-php-dependencies-with-composer
       - name: Install Composer dependencies
         uses: "ramsey/composer-install@v2"
         with:

.github/workflows/test.yml

@@ -130,7 +130,7 @@ jobs:
           jshint
 
       # Install dependencies and handle caching in one go.
-      # @link https://github.com/marketplace/actions/install-composer-dependencies
+      # @link https://github.com/marketplace/actions/install-php-dependencies-with-composer
       - name: Install Composer dependencies - normal
         if: ${{ matrix.php < '8.0' }}
         uses: "ramsey/composer-install@v2"
@@ -143,7 +143,7 @@ jobs:
         if: ${{ matrix.php >= '8.0' }}
         uses: "ramsey/composer-install@v2"
         with:
-          composer-options: --ignore-platform-reqs
+          composer-options: --ignore-platform-req=php+
           custom-cache-suffix: $(date -u "+%Y-%m")
 
       # Note: The code style check is run multiple times against every PHP version

.github/workflows/validate.yml

@@ -29,16 +29,17 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Install xmllint
-        run: |
-          sudo apt-get update
+        run: |
+          sudo apt-get update
           sudo apt-get install --no-install-recommends -y libxml2-utils
 
       - name: Retrieve XML Schema
         run: curl -O https://www.w3.org/2012/04/XMLSchema.xsd
 
       # Show XML violations inline in the file diff.
       # @link https://github.com/marketplace/actions/xmllint-problem-matcher
-      - uses: korelstar/xmllint-problem-matcher@v1
+      - name: Enable showing XML issues inline
+        uses: korelstar/xmllint-problem-matcher@v1
 
       # Validate the XML ruleset files.
       # @link http://xmlsoft.org/xmllint.html