Deprecate EventDetection.times (#635)

* Update nwb.ecephys.yaml

* Update format_release_notes.rst

* Update nwb.ecephys.yaml

Author: stephprince

core/nwb.ecephys.yaml

@@ -179,7 +179,7 @@ groups:
     - num_events
     shape:
     - null
-    doc: Timestamps of events, in seconds.
+    doc: DEPRECATED. Timestamps of events, in seconds.
     attributes:
     - name: unit
       dtype: text

docs/format/source/format_release_notes.rst

@@ -29,7 +29,7 @@ Minor changes
 - Made group quantities consistent ("1 or more") across data interfaces / wrapper types (#613)
 - Fixed typo and removed HTML tag from doc of behavioral neurodata types. (#600)
 - Improved the documentation of ``IndexSeries``. (#614)
-- Made ``EventDetection.times`` optional. (#620)
+- Made ``EventDetection.times`` optional and deprecated. Use `source_idx` instead. (#620)
 
 2.8.0 (November 24, 2024)
 -------------------------