fix typo in KubernetesCredentials (#2729)

Co-authored-by: Adam Lewis <[email protected]>

src/_nebari/stages/infrastructure/__init__.py

@@ -660,7 +660,7 @@ class NodeSelectorKeyValue(schema.Base):
 
 class KubernetesCredentials(schema.Base):
     host: str
-    cluster_ca_certifiate: str  # ignored for now.  More info in https://github.com/nebari-dev/nebari/issues/2597. # typos: ignore
+    cluster_ca_certificate: str
     token: Optional[str] = None
     username: Optional[str] = None
     password: Optional[str] = None