🚮 Remove the default value of working directory.

Author: Chisanan232

.github/workflows/rw_get_tests.yaml

@@ -23,7 +23,7 @@ on:
         description: "The working directory for test running."
         required: false
         type: string
-        default: '/'
+        default: ''
       shell_path:
         description: "The file path of shell script which gets all the test items."
         required: false

.github/workflows/rw_poetry_run_test.yaml

@@ -53,7 +53,7 @@ on:
         description: "The working directory for test running."
         required: false
         type: string
-        default: '/'
+        default: ''
       install_dependency_with_group:
         description: "Install the dependency by Poetry configuration with dependency group setting. This parameter receive the dependency group naming."
         type: string