Fix URL in readme

Author: frivoal

README.md

@@ -12,7 +12,7 @@ Discussion happens in the context of the W3C Process Community Group
 
 * [main](https://github.com/w3c/process/tree/main) branch (current draft of the CG):
 [Preview](https://www.w3.org/policies/process/drafts/)
-* [ab-tag-discipline](https://github.com/w3c/process/tree/ab-tag-discipline) branch, where potential procedures for removal and recall of AB or TAG members are being worked out: [preview](https://www.w3.org/policies/process/drafts/ab-tag-discipline)
+* [ab-tag-discipline](https://github.com/w3c/process/tree/ab-tag-discipline) branch, where potential procedures for removal and recall of AB or TAG members are being worked out: [preview](https://www.w3.org/policies/process/drafts/ab-tag-discipline/)
 
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 ## Useful searches