Prebid Server prepare release 1.52.0

Author: rpanchyk

pom.xml

@@ -4,7 +4,7 @@
 
     <groupId>org.prebid</groupId>
     <artifactId>prebid-server</artifactId>
-    <version>1.52.0-SNAPSHOT</version>
+    <version>1.52.0</version>
 
     <name>prebid-server</name>
     <description>Prebid Server (Server-side Header Bidding)</description>
@@ -15,7 +15,7 @@
 
     <scm>
         <developerConnection>scm:git:[email protected]:prebid/prebid-server-java.git</developerConnection>
-        <tag>HEAD</tag>
+        <tag>1.52.0</tag>
     </scm>
 
     <properties>