Fix for Issue #4047 - retention and bucket creation

[sleto-it]

Fix for Issue #4047 for /v2/ (better links between retention info and bucket creation info).

In addition, fixes also the following issues:

1. Wrong indentation

Issue 1.1 (before):

Issue 1.1 (now):

Issue 1.2 (before):

Issue 1.2 (now):

2. Issue with bold

As it was before:

As it is now:

3. Adds missing comma

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Describe your proposed changes here.

• [ ] Signed the InfluxData CLA (if necessary)
• [ ] Rebased/mergeable

[sleto-it]

@jstirnaman FYI