fix(post): register CLDT post in sidebar, blog index, and news; remove draft flag

Per review feedback: add to myst.yml toc, posts/index.md card, and news.md entry.

Author: jt14den

myst.yml

@@ -48,6 +48,7 @@ project:
     - title: Blog
       children:
         - file: posts/index.md
+        - file: posts/develop-open-source-lesson-cldt/index.md
         - file: posts/repowise-announcement/index.md
         - file: posts/ossprey-announcement/index.md
         - file: posts/uc-open-25-report/index.md

news.md

@@ -2,6 +2,10 @@
 title: News
 ---
 
+## 2026-06-15: Develop an Open Source Lesson with the UC OSPO Network
+
+Four Carpentries CLDT cohorts are running this summer and fall. Express interest by June 30. [Learn more](posts/develop-open-source-lesson-cldt/index.md).
+
 ## UC Open 2026 CfP
 
 Save the date! [UC Open 2026](events/uc-open-2026/index.md) will be held 22-23 April at Berkeley.

posts/develop-open-source-lesson-cldt/index.md

@@ -1,6 +1,5 @@
 ---
 date: 2026-06-15
-draft: true
 title: "Develop an Open Source Lesson with the UC OSPO Network"
 description: "The UC OSPO Network is running four Carpentries Collaborative Lesson Development Training cohorts this summer and fall. We're looking for people to join an already-scoped lesson team or propose a new lesson."
 author: Tim Dennis

posts/index.md

@@ -6,6 +6,13 @@ title: Blog
 :class: blog-cards
 ::::{grid} 1 2 3 3
 
+:::{card} Develop an Open Source Lesson with the UC OSPO Network
+:link: /posts/develop-open-source-lesson-cldt
+:footer: June 15, 2026
+
+The UC OSPO Network is running four Carpentries CLDT cohorts this summer and fall. Join an already-scoped lesson team or propose a new lesson idea.
+:::
+
 :::{card} Introducing RepoWise
 :link: /posts/repowise-announcement
 :footer: November 25, 2025