deps: Update maven-shared-utils to v3.2.1 (googleapis#3768)

See b/392225607

Author: lqiu96

java-shared-dependencies/dependency-convergence-check/pom.xml

@@ -17,6 +17,16 @@
     <maven.compiler.target>1.8</maven.compiler.target>
   </properties>
 
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>org.apache.maven.shared</groupId>
+        <artifactId>maven-shared-utils</artifactId>
+        <version>3.2.1</version>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+
   <dependencies>
     <dependency>
       <groupId>com.google.guava</groupId>

java-shared-dependencies/unmanaged-dependency-check/pom.xml

@@ -52,6 +52,16 @@
     </plugins>
   </build>
 
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>org.apache.maven.shared</groupId>
+        <artifactId>maven-shared-utils</artifactId>
+        <version>3.2.1</version>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+
   <dependencies>
     <dependency>
       <groupId>com.google.cloud.tools</groupId>