Add 2.15.0 second go/nogo meeting on 06/24

Signed-off-by: Peter Zhu <[email protected]>

_events/2024-0625-2-15-release-meetings.markdown

@@ -1,6 +1,6 @@
 ---
-calendar_date: '2024-06-21'
-eventdate: 2024-06-21 08:00:00 -0700
+calendar_date: '2024-06-24'
+eventdate: 2024-06-24 08:30:00 -0700
 title: OpenSearch 2.15.0 Release Meetings
 online: true
 signup:
@@ -25,13 +25,17 @@ On-going release discussions in the [#releases](https://opensearch.slack.com/arc
 
 * Go / No-Go voting
 
+**June 24st 2024 - 8:30AM PDT**
+
+* Go / No-Go voting
+
 **[Placeholder] June 25th 2024 - 2:00PM PDT**
 
 * [Release / Post release](https://github.com/opensearch-project/opensearch-build/wiki/Releasing-the-Distribution#release) (Release day!) [Release manager, leadership team, Repository owners ]
 
 * Last possible date 06/25/2024 per the [Releases schedule](https://opensearch.org/releases.html).
 
-**[Placeholder] June Pending 2024 - 8AM PDT**
+**[Placeholder] June Pending 2024 - 8:30AM PDT**
 
 * [Retrospective](https://github.com/opensearch-project/opensearch-build/issues/4786) - Let's do a retro on the 2.15.0 release as a community.