build(deps): update dependency org.apache.maven.plugins:maven-javadoc-plugin to v3.4.1

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.apache.maven.plugins:maven-javadoc-plugin (source)	3.4.0 -> 3.4.1

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[lqiu96]

Warning: Used undeclared dependencies found:
Warning: com.google.api.grpc:proto-google-iam-v1:jar:1.5.2:compile

Pulled in from shared-dependencies -- Output from mvn help:effective-pom -Dverbose=true

<dependency>
<groupId>com.google.api.grpc</groupId> <!-- com.google.cloud:first-party-dependencies:3.0.4, line 166 -->
<artifactId>proto-google-iam-v1</artifactId> <!-- com.google.cloud:first-party-dependencies:3.0.4, line 167 -->
<version>1.6.2</version> <!-- com.google.cloud:first-party-dependencies:3.0.4, line 168 -->
</dependency>

Is not an issue for any other split repo? Or do all of the grpc-* modules use iam?