NONRTRIC: ACM Participants upgrade maven version

Maven version upgraded to 3.9 for ACM Participants in NONRTRIC

Issue-ID: NONRTRIC-1030
Change-Id: I754f374531fe209d1650d3066cbaaecb548f25cb
Signed-off-by: aravind.est <aravindhan.a@est.tech>
diff --git a/jjb/nonrtric-plt-rappmanager/nonrtric-plt-rappmanager.yaml b/jjb/nonrtric-plt-rappmanager/nonrtric-plt-rappmanager.yaml
index 23698b7..c71894f 100644
--- a/jjb/nonrtric-plt-rappmanager/nonrtric-plt-rappmanager.yaml
+++ b/jjb/nonrtric-plt-rappmanager/nonrtric-plt-rappmanager.yaml
@@ -97,7 +97,7 @@
     gerrit_trigger_file_paths:
       - compare-type: REG_EXP
         pattern: "participants/.*"
-    mvn-version: mvn36
+    mvn-version: mvn39
     java-version: openjdk17
     jacoco-exclude-pattern: !include-raw-escape: coverage-exclude-pattern-participants.txt