[OPB-42] aligning templates with new multi embed support

templates/oneplus-bot-templates/module-templates/news-templates/src/main/resources/en_US/commands/news/news_post_embed_en_US.ftl

@@ -1,12 +1,18 @@
 {
   <#assign roleMention="<@&479202891358535681>"/>
   <#assign authorMention>${author.user.name}#${author.user.discriminator}</#assign>
-  "additionalMessage": "<@safe_include "news_post_description"/>",
-  <#if message.attachments?size gt 0>
-    "imageUrl": "${message.attachments[0].proxyUrl}",
-  </#if>
-  "metaConfig": {
-    "allowsRoleMention": true,
-    "preventEmptyEmbed": true
-  }
+    "additionalMessage": "<@safe_include "news_post_description"/>",
+    "embeds": [
+        {
+            <#if message.attachments?size gt 0>
+            "imageUrl": "${message.attachments[0].proxyUrl}",
+            </#if>
+            "metaConfig": {
+                "preventEmptyEmbed": true
+            }
+        }
+    ],
+    "messageConfig": {
+        "allowsRoleMention": true
+    }
 }