Add release notes for NRDOT 1.15.0

[otelcomm-bot]

Add release notes for NRDOT 1.15.0

Note: PR is auto-generated. If anything looks off, please contact the maintainers of nrdot-collector-releases.

[github-actions]

Hi @otelcomm-bot 👋

Thanks for your pull request! Your PR is in a queue, and a writer will take a look soon. We generally publish small edits within one business day, and larger edits within three days.

Please ensure the propsed changes look good by building it first in your local environment. Refer to this contribution guide to get the site up and running in your local.

If you really require a preview url, reach out to one of the writers and they will generate one for you.

[WriteMayur]

netlify build fork

[svc-docs-eng-opensource-bot]

✅ Your PR has been mirrored to our repository as PR #23953.
Commit: 97ad92c437fe93099545efee6fc5e30c604c6611 (97ad92c)
Our workflows will run in the mirrored PR linked above.
🚀 If the build is successful, a Netlify preview will be available shortly at: https://otelcomm-bot-nrdot-release-notes-1-15--docs-website-netlify.netlify.app

[WriteMayur]

lgtm