fix: the name of the span events in record_exception should be 'excep…

…tion' (#12505)

To be consistent with OpenTelemetry semantics (which are the ones on
which ET aligns), the span events created from a record_exception call
should be called 'exception'

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## Reviewer Checklist
- [x] Reviewer has checked that all the criteria below are met 
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[API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces)
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ddtrace/_trace/span.py

@@ -593,7 +593,7 @@ def record_exception(
             # User provided attributes must take precedence over attrs
             attrs.update(attributes)
 
-        self._add_event(name="recorded exception", attributes=attrs, timestamp=timestamp)
+        self._add_event(name="exception", attributes=attrs, timestamp=timestamp)
 
     def _pprint(self) -> str:
         """Return a human readable version of the span."""

releasenotes/notes/fix-exception-events-name-34fcaa4d49987935.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    tracing: Changes the name of the span event generated by a record_exception
+    call as it was not following OTEL semantics.