chore: update spec release link

Signed-off-by: Michael Beemer <[email protected]>

Author: beeme1mr

README.md

@@ -12,7 +12,7 @@
 <!-- x-hide-in-docs-end -->
 <!-- The 'github-badges' class is used in the docs -->
 <p align="center" class="github-badges">
-  <a href="https://github.com/open-feature/spec/tree/v0.5.2">
+  <a href="https://github.com/open-feature/spec/releases/tag/v0.5.2">
     <img alt="Specification" src="https://img.shields.io/static/v1?label=specification&message=v0.5.2&color=yellow&style=for-the-badge" />
   </a>
   <!-- x-release-please-start-version -->