chore: set empty string as name

It should be boolean/number/string

Author: kenjis

.github/workflows/test-phpunit.yml

@@ -109,7 +109,7 @@ jobs:
 
     uses: ./.github/workflows/reusable-phpunit-test.yml # @TODO Extract to codeigniter4/.github repo
     with:
-      job-name:
+      job-name: ''
       php-version: ${{ matrix.php-version }}
       job-id: database-live-tests
       db-platform: ${{ matrix.db-platform }}
@@ -141,7 +141,7 @@ jobs:
 
     uses: ./.github/workflows/reusable-phpunit-test.yml # @TODO Extract to codeigniter4/.github repo
     with:
-      job-name:
+      job-name: ''
       php-version: ${{ matrix.php-version }}
       job-id: separate-process-tests
       group-name: SeparateProcess