Update dependency org.apache.maven.plugins:maven-gpg-plugin to v3.2.4 (#7)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
|
[org.apache.maven.plugins:maven-gpg-plugin](https://maven.apache.org/plugins/)
| `3.2.3` -> `3.2.4` |
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|
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pom.xml

@@ -127,7 +127,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-gpg-plugin</artifactId>
-                        <version>3.2.3</version>
+                        <version>3.2.4</version>
                         <executions>
                             <execution>
                                 <id>sign-artifacts</id>