Update releases notes and step version for G Maintenance Release

Issue-ID: NONRTRIC-838
Signed-off-by: ychacon <yennifer.chacon@est.tech>
Change-Id: I1a8c0e1587a50ac0acf74d825aebf15f5ac48eb6
diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index b643337..7141ad2 100644
--- a/docs/release-notes.rst
+++ b/docs/release-notes.rst
@@ -56,6 +56,9 @@
 | 2022-12-12 | 2.5.0    | Henrik Andersson | G Release          |
 |            |          |                  |                    |
 +------------+----------+------------------+--------------------+
+| 2023-02-10 | 2.5.1    | Yennifer Chacon  | G Maintenance      |
+|            |          |                  | Release            |
++------------+----------+------------------+--------------------+
 
 Release Data
 ============
@@ -252,3 +255,22 @@
 |                             |                                                   |
 +-----------------------------+---------------------------------------------------+
 
+G Maintenance Release
+---------------------
++-----------------------------+---------------------------------------------------+
+| **Project**                 | Non-RT RIC A1 Policy Management Service           |
+|                             |                                                   |
++-----------------------------+---------------------------------------------------+
+| **Repo/commit-ID**          | nonrtric/plt/a1policymanagementservice            |
+|                             | a88e7e03d172d1f1fb39be2c8f958eaf4ee50c30          |
+|                             |                                                   |
++-----------------------------+---------------------------------------------------+
+| **Release designation**     | G                                                 |
+|                             |                                                   |
++-----------------------------+---------------------------------------------------+
+| **Release date**            | 2023-02-10                                        |
+|                             |                                                   |
++-----------------------------+---------------------------------------------------+
+| **Purpose of the delivery** | Update springboot version                         |
+|                             |                                                   |
++-----------------------------+---------------------------------------------------+
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index 1a585fa..d680e8e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -31,7 +31,7 @@
     </parent>
     <groupId>org.o-ran-sc.nonrtric.plt</groupId>
     <artifactId>a1policymanagementservice</artifactId>
-    <version>2.5.1-SNAPSHOT</version>
+    <version>2.5.2-SNAPSHOT</version>
     <licenses>
         <license>
             <name>The Apache Software License, Version 2.0</name>