Use two-digit version identifier

Author: jotaen

README.md

@@ -9,4 +9,4 @@ A plain-text file format for todos and check lists.
 - 👉 [**Learn how [x]it! works**](https://xit.jotaen.net)
 - 💡 [Read the file specification](Specification.md)
 - 💬 [Discuss ideas and questions](https://github.com/jotaen/xit/discussions)
-- 🛠 [Share an [x]it! tool you made](https://github.com/jotaen/xit/discussions/new?category=show-tell)
+- 🛠 [Share an [x]it! tool you made](https://github.com/jotaen/xit/discussions/categories/show-tell)

Specification.md

@@ -1,6 +1,6 @@
 # [x]it! Specification
 
-**Version 1**
+**Version 1.0**
 
 [x]it! is a plain-text file format for todos and check lists.