Commented out repository.apache.org in build.gradle for testing unreleased FreeMarker versions (OFBIZ-12934)

Added the Apache snapshots repository (repository.apache.org) as a commented-out block in build.gradle.
This can be used to test unreleased FreeMarker versions in the future.

Note: The repository is disabled by default, as repository.apache.org is not intended for general-purpose Maven use.
As per https://infra.apache.org/abc, it should only be used for testing pre-production ASF artifacts.

Author: dixitdeepak

build.gradle

@@ -212,7 +212,10 @@ allprojects {
         maven {
             url "https://artifacts.alfresco.com/nexus/content/repositories/public/"
         }
-
+        /* maven {
+            // To test not released FreeMarker versions
+            url "https://repository.apache.org/content/repositories/snapshots/"
+        } */
     }
 }