Fix the `MULTIPLE_AREAS` and multiple colon(:) in same line of the generated release notes.

[chandankumar4]

What would you like to be added (User Story)?

Automate the process to fix MULTIPLE_AREAS and multiple colon(:) in the same line of generated release notes!!

Detailed Description

What's need to happen

• Look for any MULTIPLE_AREAS entries. If the PR does indeed guarantee multiple areas, just remove the MULTIPLE_AREAS prefix and just leave the areas.
• Remove the multiple colon(:) from a line.

Anything else you would like to add?

No response

Label(s) to be applied

/kind feature
One or more /area label. See https://github.com/kubernetes-sigs/cluster-api/labels?q=area for the list of labels.

[sbueringer]

Yeah I would just make multiple areas a regular case. In basically all cases this is intended and not an error. So we should just list the areas

[chrischdi]

/help

[k8s-ci-robot]

@chrischdi:
This request has been marked as needing help from a contributor.

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[neoaggelos]

/assign