Fix typo

ca/client.go

@@ -563,7 +563,7 @@ func (c *Client) retryOnError(r *http.Response) bool {
 	return false
 }
 
-// GetCaURL returns the configura CA url.
+// GetCaURL returns the configured CA url.
 func (c *Client) GetCaURL() string {
 	return c.endpoint.String()
 }