Broken links in README

[letmerecall]

What's the issue?

There're 2 broken links in the README.md which are not resolving to correct resources:

1. contributor guide: https://sigs.k8s.io/hydrophone/blob/main/CONTRIBUTING.md
2. filing an issue: https://sigs.k8s.io/hydrophone/issues/new

[letmerecall]

/good-first-issue

[k8s-ci-robot]

@letmerecall: This request has been marked as suitable for new contributors.

Guidelines

Please ensure that the issue body includes answers to the following questions:

• Why are we solving this issue?
• To address this issue, are there any code changes? If there are code changes, what needs to be done in the code and what places can the assignee treat as reference points?
• Does this issue have zero to low barrier of entry?
• How can the assignee reach out to you for help?

For more details on the requirements of such an issue, please see here and ensure that they are met.

If this request no longer meets these requirements, the label can be removed by commenting with the /remove-good-first-issue command.

In response to [this](https://github.com/kubernetes-sigs/hydrophone/issues/151): >/good-first-issue Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.

[UtkarshUmre]

Hey @letmerecall could you assign this to me?

[letmerecall]

Feel free to take it @UtkarshUmre

/assign @UtkarshUmre

[UtkarshUmre]

Hey @letmerecall where can I find the new link for filing an issue?