feat(ci): update maven-source-plugin to fix Semantic Release failure (#6)

Author: sukidayou

pom.xml

@@ -56,6 +56,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-source-plugin</artifactId>
+                <version>3.3.1</version>
                 <executions>
                     <execution>
                         <id>attach-sources</id>