Merge pull request #18277 from dmccown/dmccown/update-reserved-event-…

…types

feat: Mark Entity as reserved event

src/content/docs/data-apis/custom-data/custom-events/data-requirements-limits-custom-event-data.mdx

@@ -181,6 +181,7 @@ Avoid using the following reserved words as names for events and attributes. Oth
         For your `eventType` value, avoid using:
 
         * `Metric`, `MetricRaw`, and strings prefixed with `Metric[0-9]` (such as `Metric2` or `Metric1Minute`).
+        * `Entity`, `EntityUpdate`, and strings prefixed with `Entity[0-9]` (such as `Entity2` or `Entity1HOUR`).
         * `Public_` and strings prefixed with `Public_`.
 
         These event types are reserved for use by New Relic. Events passed in with these `eventType` values will be dropped.