Change plugin API to 2.8.1

Change-Id: I2da4d27804d09ce9c12b92298b6169ba651d1599

pom.xml

diff --git a/pom.xml b/pom.xml
index 9d6a4fb..edb405d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -22,7 +22,7 @@
   <groupId>com.googlesource.gerrit.plugins.reviewersbyblame</groupId>
   <artifactId>reviewersbyblame</artifactId>
   <packaging>jar</packaging>
-  <version>2.8-SNAPSHOT</version>
+  <version>2.8.1</version>
   <name>reviewersbyblame</name>
 
   <properties>
@@ -86,7 +86,7 @@
   <repositories>
     <repository>
       <id>gerrit-api-repository</id>
-      <url>https://gerrit-api.commondatastorage.googleapis.com/snapshot/</url>
+      <url>https://gerrit-api.commondatastorage.googleapis.com/release</url>
     </repository>
   </repositories>
   <description>Find possible reviewers using git blame</description>