GH Actions workflows: fix PHP set up step

To disable code coverage, the `coverage` key should be set to `none`. `false` is not a valid (or supported) value, so the behaviour may be unpredictable.

Ref: https://github.com/shivammathur/setup-php#disable-coverage

Author: jrfnl

.github/workflows/release.yml

@@ -19,7 +19,7 @@ jobs:
         with:
           php-version: 5.4
           extensions: exif, phar, openssl
-          coverage: false
+          coverage: none
           ini-values: phar.readonly=Off
 
       - name: Install Box from GitHub
@@ -79,7 +79,7 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php }}
-          coverage: false
+          coverage: none
 
       - name: Run linter against codebase
         run: php ./parallel-lint.phar src/

.github/workflows/test.yml

@@ -61,7 +61,7 @@ jobs:
         with:
           php-version: 5.4
           extensions: exif, phar, openssl
-          coverage: false
+          coverage: none
           ini-values: phar.readonly=Off
 
       - name: Install Box from GitHub
@@ -121,7 +121,7 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php }}
-          coverage: false
+          coverage: none
 
       - name: Run linter against codebase
         run: php ./parallel-lint.phar src/