docs(alerting): minor enhancements to intro concepts and example (#102023)
* docs(alerting): minor enhancements to intro concepts and example
* Update docs/sources/alerting/fundamentals/alert-rules/annotation-label.md
Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>
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Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>
(cherry picked from commit 64b65ffc72)