Documentation/upgrades: update upgrade doc indexes
@@ -8,6 +8,8 @@ This section contains documents specific to upgrading etcd clusters and applicat
## Upgrading an etcd v3.x cluster
* [Upgrade etcd from 3.0 to 3.1][upgrade-3-1]
* [Upgrade etcd from 3.1 to 3.2][upgrade-3-2]
+* [Upgrade etcd from 3.2 to 3.3][upgrade-3-3]
+* [Upgrade etcd from 3.3 to 3.4][upgrade-3-4]
## Upgrading from etcd v2.3
* [Upgrade a v2.3 cluster to v3.0][upgrade-cluster]
@@ -17,3 +19,5 @@ This section contains documents specific to upgrading etcd clusters and applicat
[upgrade-cluster]: upgrade_3_0.md
[upgrade-3-1]: upgrade_3_1.md
[upgrade-3-2]: upgrade_3_2.md
+[upgrade-3-3]: upgrade_3_3.md
+[upgrade-3-4]: upgrade_3_4.md
