Bump shade plugin version (#6397)

Author: RanVaknin

test/http-client-benchmarks/pom.xml

@@ -175,7 +175,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-shade-plugin</artifactId>
-                <version>2.2</version>
+                <version>3.5.0</version>
                 <executions>
                     <execution>
                         <phase>package</phase>

test/sdk-benchmarks/pom.xml

@@ -340,7 +340,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-shade-plugin</artifactId>
-                <version>2.2</version>
+                <version>3.5.0</version>
                 <executions>
                     <execution>
                         <phase>package</phase>