Update pom.xml (#107)

diff --git a/spark-doris-connector/pom.xml b/spark-doris-connector/pom.xml
index def5c00..471eecd 100644
--- a/spark-doris-connector/pom.xml
+++ b/spark-doris-connector/pom.xml
@@ -27,7 +27,7 @@
     </parent>
     <groupId>org.apache.doris</groupId>
     <artifactId>spark-doris-connector-${spark.major.version}_${scala.version}</artifactId>
-    <version>1.2.0-SNAPSHOT</version>
+    <version>${revision}</version>
     <name>Spark Doris Connector</name>
     <url>https://doris.apache.org/</url>
     <licenses>
@@ -62,6 +62,7 @@
         </mailingList>
     </mailingLists>
     <properties>
+        <revision>1.2.0-SNAPSHOT</revision>
         <spark.version>3.1.2</spark.version>
         <spark.major.version>3.1</spark.major.version>
         <scala.version>2.12</scala.version>