Refine branch regex to match new semver branches

.circleci/config.yml

@@ -124,4 +124,4 @@ workflows:
               only: /.*/
             branches:
               # 8.x, 8.x-Y.x, 2.x, ci
-              only: /^8\.x(?:\-[0-9]+\.x)?|[0-9]+(\.(?:\-[0-9]+){2})?|ci$/
+              only: /^8\.x(?:\-[0-9]+\.x)?|[0-9]+\.[0-9]+(?:\.x)?|ci$/