build(deps): update dependency org.apache.maven.plugins:maven-javadoc-plugin to v3.6.3 (#1948)

Author: renovate-bot

google-http-client-bom/pom.xml

@@ -128,7 +128,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-javadoc-plugin</artifactId>
-        <version>3.5.0</version>
+        <version>3.6.3</version>
         <configuration>
           <skip>true</skip>
         </configuration>

pom.xml

@@ -313,7 +313,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-javadoc-plugin</artifactId>
-          <version>3.5.0</version>
+          <version>3.6.3</version>
           <executions>
             <execution>
               <id>attach-javadocs</id>