fix(docs): typo in the architecture section (cloudnative-pg#7383)

Signed-off-by: Lauri Tirkkonen <lauri@hacktheplanet.fi>
(cherry picked from commit 1decc91)

Author: lotheac

docs/src/architecture.md

@@ -136,7 +136,7 @@ the [replica cluster feature](replica_cluster.md)).
 ![Example of a Kubernetes architecture with only 2 data centers](./images/k8s-architecture-2-az.png)
 
 !!! Hint
-    If you are at en early stage of your Kubernetes journey, please share this
+    If you are at an early stage of your Kubernetes journey, please share this
     document with your infrastructure team. The two data centers setup might
     be simply the result of a "lift-and-shift" transition to Kubernetes
     from a traditional bare-metal or VM based infrastructure, and the benefits