fix: sources table rendering

[prushh]

Fixes #6139

Proposed Changes

• add missing table delimiters (pipes)
• update RedisSource url with knative-extensions/eventing-redis repository url

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[prushh]

Should I bump the RedisSource status to "Beta"? Ref: https://github.com/knative-extensions/eventing-redis?tab=readme-ov-file#redis-components-for-knative

Edit: Also let me know if I can fix the unit tests in this PR, I think it is only necessary to change the version of express in the Recreating the sample code section of this README.md

[Cali0707]

Should I bump the RedisSource status to "Beta"? Ref: https://github.com/knative-extensions/eventing-redis?tab=readme-ov-file#redis-components-for-knative

Yes, it looks like the components are beta, so correcting that would be really helpful!

Edit: Also let me know if I can fix the unit tests in this PR, I think it is only necessary to change the version of express in the Recreating the sample code section of this README.md

I think it would be fine to fix it in either this PR or a new one

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Cali0707, prushh

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