Add news item for Ion Schema RFC Process (#309)

_posts/2024-04-12-ion-schema-rfc-process-public-comment.md

@@ -0,0 +1,13 @@
+---
+layout: news_item
+title: "RFC: Ion Schema RFC Process - Open for Comment"
+date: 2024-04-12
+categories: news ion-schema
+---
+
+An RFC was published to the [Ion Schema](https://github.com/amazon-ion/ion-schema) GitHub repository proposing a process for RFCs that modify the Ion Schema Language.
+Questions, comments, and suggestions are welcome and can be added to the ‘Conversation’ tab of the pull request.
+
+The public comment period for this RFC is open until 10 May 2024. 
+
+| [Ion Schema RFC Process](https://github.com/amazon-ion/ion-schema/pull/133) |