Merge pull request #29563 from developer0hye:agent/msmf-close-event-handle

videoio(MSMF): close leaked SourceReaderCB Event handle 🤖🤖🤖

modules/videoio/src/cap_msmf.cpp

@@ -566,6 +566,8 @@ private:
     // Destructor is private. Caller should call Release.
     virtual ~SourceReaderCB()
     {
+        if (m_hEvent)
+            CloseHandle(m_hEvent);
         CV_LOG_INFO(NULL, "terminating async callback");
     }