Add fix version for 1.20.x UI known issue (#1200)

Follow-on to #642

I didn't realize this partial also needed to be updated.

Author: hellobontempo

content/vault/v1.21.x/content/partials/release-notes/change-summary/1_20.mdx

@@ -11,5 +11,5 @@ Found  | Fixed  | Workaround | Edition    | Issue
 ------ |--------| ---------- | ---------- | -----
 1.20.0 | No     | **Yes**    | All        | [Duplicate unseal/seal wrap HSM keys](/vault/docs/v1.20.x/updates/important-changes#hsm-keys)
 1.20.0 | 1.20.1 | **Yes**    | Enterprise | [Development cluster setting overwritten on secondary cluster reload](/vault/docs/v1.20.x/updates/important-changes#development-cluster-reload)
-1.20.0 | No     | **Yes**    | All        | [UI login fails for auth mounts with underscores and unauthenticated listing](/vault/docs/v1.20.x/updates/important-changes#ui-login-underscore)
-1.20.0 | No     | **Yes**    | All        | [UI navigation to a KV v2 secret with an underscore errors without permissions to read subkeys](/vault/docs/v1.20.x/updates/important-changes#ui-kvv2-underscore-secrets)
+1.20.0 | 1.20.1 | **Yes**    | All        | [UI login fails for auth mounts with underscores and unauthenticated listing](/vault/docs/v1.20.x/updates/important-changes#ui-login-underscore)
+1.20.0 | 1.20.1 | **Yes**    | All        | [UI navigation to a KV v2 secret with an underscore errors without permissions to read subkeys](/vault/docs/v1.20.x/updates/important-changes#ui-kvv2-underscore-secrets)