fix: wait long for validation from relaychain node

[abhiyana]

Description:

Commit Message

fix: wait long for validation from relaychain node

see the guidelines for commit messages.

Changelog Entry

version: <log entry>

Checklist:

• I have performed a self-review of my own code
• I have documented my code in accordance with the [documentation guidelines (https://github.com/icon-project/community/blob/main/guidelines/technical/software-development-guidelines.md#documentation)
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have run the unit tests
• I only have one commit (if not, squash them into one commit).
• I have a descriptive commit message that adheres to the commit message guidelines

Please review the CONTRIBUTING.md file for detailed contributing guidelines.