Update TOC.

Author: jm-franc

keps/sig-autoscaling/4951-configurable-hpa-tolerance/README.md

@@ -66,7 +66,10 @@ tags, and then generate with `hack/update-toc.sh`.
       - [Integration tests](#integration-tests)
       - [e2e tests](#e2e-tests)
   - [Graduation Criteria](#graduation-criteria)
+    - [Alpha](#alpha)
   - [Upgrade / Downgrade Strategy](#upgrade--downgrade-strategy)
+    - [Upgrade](#upgrade)
+    - [Downgrade](#downgrade)
   - [Version Skew Strategy](#version-skew-strategy)
 - [Production Readiness Review Questionnaire](#production-readiness-review-questionnaire)
   - [Feature Enablement and Rollback](#feature-enablement-and-rollback)