deps: update opencensus.version to v0.31.0 (googleapis#727)

Author: renovate-bot

pom.xml

@@ -55,7 +55,7 @@
  <truth.version>1.1.3</truth.version>
  <mockito.version>4.3.0</mockito.version>
  <hamcrest.version>2.2</hamcrest.version>
- <opencensus.version>0.30.0</opencensus.version>
+ <opencensus.version>0.31.0</opencensus.version>
  </properties>
 
  <dependencyManagement>