build(deps): update dependency org.apache.maven.plugins:maven-shade-p…

…lugin to v3.2.3 (googleapis#79)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| org.apache.maven.plugins:maven-shade-plugin | patch | `3.2.2` -> `3.2.3` |

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google-cloud-nio/pom.xml

@@ -130,7 +130,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-shade-plugin</artifactId>
-        <version>3.2.2</version>
+        <version>3.2.3</version>
         <configuration>
           <shadedArtifactAttached>true</shadedArtifactAttached>
           <relocations>