build: define version of plugin maven-gpg-plugin (#4320)

add <maven-gpg-plugin.version>3.2.8</maven-gpg-plugin.version> Auto-cherry-to 1.0.x Fixes #4320 Signed-off-by: leeyazhou <bytesgo@163.com>

Author: leeyazhou

pom.xml

@@ -356,6 +356,7 @@
 <maven-checkstyle-plugin.failsOnError>true</maven-checkstyle-plugin.failsOnError>
 <maven-checkstyle-plugin.failOnViolation>true</maven-checkstyle-plugin.failOnViolation>
 <puppycrawl-tools-checkstyle.version>9.3</puppycrawl-tools-checkstyle.version>
+<maven-gpg-plugin.version>3.2.8</maven-gpg-plugin.version>
 
 <disable.checks>false</disable.checks>
 
@@ -892,6 +893,7 @@
 <plugin>
 <groupId>org.apache.maven.plugins</groupId>
 <artifactId>maven-gpg-plugin</artifactId>
+<version>${maven-gpg-plugin.version}</version>
 <executions>
 <execution>
 <id>sign-artifacts</id>