Fix Knative tutorial

[cmainas]

The Knative integration tutorial does not seem to work well. Trying out the steps it proposes does not lead to a proper Knative installation with some Knative components (e.g. Activator) not being installed. Except of that, we need to update the following parts of the tutorial:

• Update to a newer Knative version
• Use a newer Go version, ideally same as the rest of documentation
• Specify in a much cleaner way, how a pre-built version can be used (i.e. `Alternatively, you could use our latest build: )

[ishaanxgupta]

HI @cmainas could you please assign me this, would love to solve this

[cheese-cakee]

@cmainas if this is still open, I would like to work on this

[cmainas]

There are already 2 open PRs for this and none of them has been tested properly. This issue is not about just updating the tutorial, we need to fix the instructions to properly set up a Knative environment.

[7h3-3mp7y-m4n]

I believe both of the PR used the same llm, Let me look into this