fix branch name for publishing

Author: Madzi

pom.xml

@@ -163,6 +163,14 @@
             </activation>
             <build>
                 <plugins>
+                    <plugin>
+                      <groupId>org.apache.maven.plugins</groupId>
+                      <artifactId>maven-scm-publish-plugin</artifactId>
+                      <version>3.1.0</version>
+                      <configuration>
+                        <scmBranch>gh-pages</scmBranch>
+                      </configuration>
+                    </plugin>
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-site-plugin</artifactId>