deps: update opencensus.version to v0.28.1 (#533)

Author: renovate-bot

samples/install-without-bom/pom.xml

@@ -21,7 +21,7 @@
     <maven.compiler.target>1.8</maven.compiler.target>
     <maven.compiler.source>1.8</maven.compiler.source>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <opencensus.version>0.27.1</opencensus.version>
+    <opencensus.version>0.28.1</opencensus.version>
     <trace.version>1.2.4</trace.version>
     <cloudmonitoring.version>2.0.5</cloudmonitoring.version>
   </properties>

samples/snapshot/pom.xml

@@ -21,7 +21,7 @@
     <maven.compiler.target>1.8</maven.compiler.target>
     <maven.compiler.source>1.8</maven.compiler.source>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <opencensus.version>0.27.1</opencensus.version>
+    <opencensus.version>0.28.1</opencensus.version>
     <trace.version>1.2.4</trace.version>
     <cloudmonitoring.version>2.0.5</cloudmonitoring.version>
   </properties>

samples/snippets/pom.xml

@@ -21,7 +21,7 @@
     <maven.compiler.target>1.8</maven.compiler.target>
     <maven.compiler.source>1.8</maven.compiler.source>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <opencensus.version>0.27.1</opencensus.version>
+    <opencensus.version>0.28.1</opencensus.version>
   </properties>