Add link to DPO post

Author: emmatyping

content/posts/rust-for-cpython-2026-04/index.md

@@ -8,7 +8,7 @@ tags:
 published: true
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-> This post has also been shared on [discuss.python.org](<DPO link>).
+> This post has also been shared on [discuss.python.org](https://discuss.python.org/t/rust-for-cpython-progress-update-april-2026/106895).
 
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