GH Actions/verify release: tweak the workflow [1]

As of PHPCS 4.0.0, a new "No files were checked" error will be shown if `phpcs`/`phpcbf` runs a scan and no files end up being scanned.

Previously, to test that the downloaded PHAR file is nominally functional, the `php ${{ steps.source.outputs.FILE }} . -e --standard=PSR12` command was used.
For `phpcs`, this would "explain" the PSR12 standard, for `phpcbf`, this would spin up PHPCS and end up not scanning anything as there are no files in the working directory, but it did test that the PHAR file was functional.

This "trick" will no longer work with PHPCS 4.0.0 due to the new "No files were checked" error.
As I'd prefer for this check to do a simple scan, rather than exit out while reading the CLI arguments (like would happen with the `-h` or `-i` flags), I'm now implementing the suggestion made by fredden in https://github.com/PHPCSStandards/PHP_CodeSniffer/pull/758/files#diff-c871a3c5382d363c3ead11f0f87306fd5954b360eaa8a96fea8582bce1815827 and creating a simple PHP file to scan.

Author: jrfnl

.github/workflows/verify-release.yml

@@ -27,8 +27,8 @@ jobs:
   verify-available-downloads:
     runs-on: ubuntu-latest
 
-    # Only run this workflow in the context of this repo.
-    if: github.repository_owner == 'PHPCSStandards'
+    # Only run this workflow in the context of this repo.
+    if: github.repository_owner == 'PHPCSStandards'
 
     strategy:
       fail-fast: false
@@ -109,9 +109,11 @@ jobs:
           ini-values: error_reporting=-1, display_errors=On
           coverage: none
 
-      # Note: the `.` is in the command to make it work for both PHPCS as well PHPCBF.
+      - name: Create a PHP file
+        run: echo '<?php echo "Hello, World!";' > hello.php
+
       - name: Verify the PHAR is nominally functional
-        run: php ${{ steps.source.outputs.FILE }} . -e --standard=PSR12
+        run: php ${{ steps.source.outputs.FILE }} -- -ps hello.php --standard=PSR2
 
       - name: Grab the version
         id: asset_version
@@ -133,8 +135,8 @@ jobs:
   verify-phive:
     runs-on: ubuntu-latest
 
-    # Only run this workflow in the context of this repo.
-    if: github.repository_owner == 'PHPCSStandards'
+    # Only run this workflow in the context of this repo.
+    if: github.repository_owner == 'PHPCSStandards'
 
     strategy:
       fail-fast: false
@@ -186,9 +188,11 @@ jobs:
           GH_TOKEN: ${{ github.token }}
           GH_FORCE_TTY: true
 
-      # Note: the `.` is in the command to make it work for both PHPCS as well PHPCBF.
+      - name: Create a PHP file
+        run: echo '<?php echo "Hello, World!";' > hello.php
+
       - name: Verify the PHAR is nominally functional
-        run: php ./tools/${{ matrix.pharfile }} . -e --standard=PSR12
+        run: php ./tools/${{ matrix.pharfile }} -- -ps hello.php --standard=PSR2
 
       - name: Grab the version
         id: asset_version