Update monitoring-apis.asciidoc to remove outdated information about api.http.port

[herrBez]

Remove note that no longer applies given that api.http.port is now a range between port 9600 to port 9700

Release notes

What does this PR do?

Remove a misleading note in this documentation page that does not apply anymore what reported in the logstash settings file.

Why is it important/What is the impact to the user?

This issue is important because the documentation contained misleading information that does not apply anymore.

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files (and/or docker env variables)
• I have added tests that prove my fix is effective or that my feature works

Author's Checklist

• [ ]

How to test this PR locally

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[mergify]

This pull request does not have a backport label. Could you fix it @herrBez? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-8./d is the label to automatically backport to the 8./d branch. /d is the digit.
• backport-8.x is the label to automatically backport to the 8.x branch.

[mergify]

backport-8.x has been added to help with the transition to the new branch 8.x.
If you don't need it please use backport-skip label.

[mergify]

This pull request is now in conflicts. Could you fix it @herrBez? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b herrBez-patch-1 upstream/herrBez-patch-1
git merge upstream/main
git push upstream herrBez-patch-1