[maven-release-plugin] prepare release sling-parent-reactor-52

pom.xml

diff --git a/pom.xml b/pom.xml
index b3632bc..0a7e8f5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.apache.sling</groupId>
     <artifactId>sling-parent-reactor</artifactId>
     <packaging>pom</packaging>
-    <version>52-SNAPSHOT</version>
+    <version>52</version>
 
     <!-- the ASF parent is necessary to trigger the right release profile -->
     <parent>
@@ -38,7 +38,7 @@
         <connection>scm:git:https://gitbox.apache.org/repos/asf/sling-parent.git</connection>
         <developerConnection>scm:git:https://gitbox.apache.org/repos/asf/sling-parent.git</developerConnection>
         <url>https://gitbox.apache.org/repos/asf?p=sling-parent.git</url>
-        <tag>HEAD</tag>
+        <tag>sling-parent-reactor-52</tag>
     </scm>
 
     <modules>

sling-bundle-parent/pom.xml

diff --git a/sling-bundle-parent/pom.xml b/sling-bundle-parent/pom.xml
index 16a13b7..3c0e638 100644
--- a/sling-bundle-parent/pom.xml
+++ b/sling-bundle-parent/pom.xml
@@ -21,7 +21,7 @@
     <parent>
         <groupId>org.apache.sling</groupId>
         <artifactId>sling</artifactId>
-        <version>52-SNAPSHOT</version>
+        <version>52</version>
         <relativePath>../sling-parent</relativePath>
     </parent>
 
@@ -35,7 +35,7 @@
         <connection>scm:git:https://gitbox.apache.org/repos/asf/sling-parent.git</connection>
         <developerConnection>scm:git:https://gitbox.apache.org/repos/asf/sling-parent.git</developerConnection>
         <url>https://gitbox.apache.org/repos/asf?p=sling-parent.git</url>
-        <tag>HEAD</tag>
+        <tag>sling-parent-reactor-52</tag>
     </scm>
 
     <properties>

sling-parent/pom.xml

diff --git a/sling-parent/pom.xml b/sling-parent/pom.xml
index d691f85..38ca0ae 100644
--- a/sling-parent/pom.xml
+++ b/sling-parent/pom.xml
@@ -28,7 +28,7 @@
     <groupId>org.apache.sling</groupId>
     <artifactId>sling</artifactId>
     <packaging>pom</packaging>
-    <version>52-SNAPSHOT</version>
+    <version>52</version>
 
     <name>Apache Sling (Parent)</name>
     <description>The parent project for Apache Sling</description>
@@ -71,7 +71,7 @@
         <connection>scm:git:https://gitbox.apache.org/repos/asf/sling-parent.git</connection>
         <developerConnection>scm:git:https://gitbox.apache.org/repos/asf/sling-parent.git</developerConnection>
         <url>https://gitbox.apache.org/repos/asf?p=sling-parent.git</url>
-        <tag>HEAD</tag>
+        <tag>sling-parent-reactor-52</tag>
     </scm>
 
     <reporting>