Fail to create a container app environment with name "ni"

[v-xinda]

OS: All
Build Version: 20220405.6
Regression: Not a regression

Repro Steps:

1. F1 -> Azure Container Apps: Create Container App Environment... -> Type "ni" as the name.
2. Check whether succeeds to create a container app environment with name "ni".

Expect:
Succeed to create a container app environment with name "ni".

Actual:
Fail to create a container app environment with name "ni".