deps: update dependency com.google.cloud:google-cloud-monitoring-bom to v3.4.3

Author: renovate-bot

google-cloud-bigtable-stats/pom.xml

@@ -17,7 +17,7 @@
     <description>Experimental project to shade OpenCensus dependencies.</description>
 
     <properties>
-        <cloud.monitoring.version>3.4.2</cloud.monitoring.version>
+        <cloud.monitoring.version>3.4.3</cloud.monitoring.version>
     </properties>
 
     <dependencyManagement>