build(deps): update dependency org.apache.maven.plugins:maven-shade-plugin to v3.2.3 (googleapis#115)

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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Author: renovate-bot

java-spanner-jdbc/pom.xml

@@ -393,7 +393,7 @@
           <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-shade-plugin</artifactId>
-            <version>3.2.2</version>
+            <version>3.2.3</version>
             <executions>
               <execution>
                 <goals>