Missing declarations for SCRIPT_BEFORE_REQUIRED and SCRIPT_AFTER_REQUIRED flags

[skyArony]

The commits added by the #141 work as expected, but there is a lack of relevant declarations in action.yml, leading to:

1. VS Code prompting Invalid action input 'SCRIPT_BEFORE_REQUIRED' and Invalid action input 'SCRIPT_AFTER_REQUIRED'
2. GitHub Action execution displaying a warning: "Unexpected input(s) 'SCRIPT_BEFORE_REQUIRED', 'SCRIPT_AFTER_REQUIRED', valid inputs are ['SSH_PRIVATE_KEY', 'REMOTE_HOST', 'REMOTE_USER', 'REMOTE_PORT', 'SOURCE', 'TARGET', 'ARGS', 'SSH_CMD_ARGS', 'EXCLUDE', 'SCRIPT_BEFORE', 'SCRIPT_AFTER']".

Therefore, I have added the relevant declarations in the PR to fix this issue.

[dgw]

Shouldn't this be closed as completed after #178 was merged + a release went out with the fix?

[skyArony]

release at v5.0.2