Update script location on publish-snapshot.sh (opensearch-project#792)

Signed-off-by: Peter Zhu <zhujiaxi@amazon.com>

Author: peterzhuamazon

.github/workflows/publish_snapshot.yml

@@ -139,6 +139,6 @@ jobs:
 
       - name: Get credentials and publish snapshots to maven
         run: |
-          build/publish/publish-snapshot.sh $MAVEN_HOME
+          build/scripts/legacy/publish/publish-snapshot.sh $MAVEN_HOME