Update CODEOWNERS, change log levels to better reflect what user is logging (Azure#29543)

Author: lzchen

.github/CODEOWNERS

@@ -917,7 +917,7 @@
 #/<NotInRepo>/          @ccmshowbackdevs
 
 # ServiceLabel: %Monitor - Exporter %Service Attention
-#/<NotInRepo>/          @@cijothomas @@reyang @@rajkumar-rangaraj @@TimothyMothra @@vishweshbankwar @@ramthi
+#/<NotInRepo>/          @lzchen @jeremydvoss
 
 
 # Management Plane

sdk/monitor/azure-monitor-opentelemetry-exporter/samples/logs/sample_exception.py

@@ -28,6 +28,7 @@
 handler = LoggingHandler()
 logger = logging.getLogger(__name__)
 logger.addHandler(handler)
+logger.setLevel(logging.ERROR)
 
 # The following code will generate two pieces of exception telemetry
 # that are identical in nature