upgrade protobuf to 3.19.6

Signed-off-by: iosmanthus <[email protected]>

Author: iosmanthus

pom.xml

@@ -75,12 +75,12 @@
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>3.19.1</version>
+            <version>3.19.6</version>
         </dependency>
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java-util</artifactId>
-            <version>3.19.1</version>
+            <version>3.19.6</version>
         </dependency>
         <dependency>
             <groupId>io.perfmark</groupId>