Chore: Pin latest webtop container in k8s manifest

[Krishnaag23]

Thank you for submitting a pull request to the WrongSecrets Party!

What kind of changes does this PR include?

• Fixes or refactors
• Platform support
• A new feature
• Additional documentation
• Something else

Checklist:

• All the contributions made are solely the work of me and my co-authors
• I tested the changes in this PR (if applicable)
• I added tests to ensure my change works (if applicable)
• The PR passes pre-commit hooks and automated tests

Fixes issue #371

• I have pinned the latest webtop tag in the k8s manifest
• I have tested the balancer by running the existing tests in wrongsecrets-balancer

[commjoen]

Hello @Krishnaag23 , thank you for the PR & initial testing! Can you please check if you can start the platform as described in https://github.com/OWASP/wrongsecrets-ctf-party/blob/main/CONTRIBUTING.md#testing-your-changes-with-preview-deployments (or use https://github.com/OWASP/wrongsecrets-ctf-party/blob/main/build-and-deploy-container-minikube.sh )and see if you can indeed use the new environment by setting up a team?