update version to 3.8.0

Author: Nicole00

connector/pom.xml

@@ -5,15 +5,15 @@
     <parent>
         <artifactId>nebula-flink</artifactId>
         <groupId>com.vesoft</groupId>
-        <version>3.0-SNAPSHOT</version>
+        <version>3.8.0</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>nebula-flink-connector</artifactId>
 
     <properties>
-        <nebula.version>3.0-SNAPSHOT</nebula.version>
+        <nebula.version>3.8.0</nebula.version>
         <flink.version>1.14.4</flink.version>
         <scala.binary.version>2.11</scala.binary.version>
         <compiler.source.version>1.8</compiler.source.version>

example/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>nebula-flink</artifactId>
         <groupId>com.vesoft</groupId>
-        <version>3.0-SNAPSHOT</version>
+        <version>3.8.0</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>

pom.xml

@@ -7,7 +7,7 @@
     <groupId>com.vesoft</groupId>
     <artifactId>nebula-flink</artifactId>
     <packaging>pom</packaging>
-    <version>3.0-SNAPSHOT</version>
+    <version>3.8.0</version>
 
     <modules>
         <module>connector</module>