Updated Preferred Chain (markdown)

Preferred-Chain.md

@@ -6,14 +6,17 @@ If the ACME CA provides multiple cert chain, you can use `--preferred-chain` to
 
 https://letsencrypt.org/docs/staging-environment/
 
-    There are 2 chains provided:
+There are 2 chains provided:
 
-    |   Name                        |  Default |
-    |-------------------------------|----------|
-    |   (STAGING) Pretend Pear X1   |   No     |
-    |   (STAGING) Bogus Broccoli X2 |   Yes    |
 
-    You select the ca like:
+|   Name                        |  Default |
+|-------------------------------|----------|
+|   (STAGING) Pretend Pear X1   |   No     |
+|   (STAGING) Bogus Broccoli X2 |   Yes    |
+
+
+You select the ca like:
+
 ```
 acme.sh  --issue -d example.com .....  --test    --preferred-chain  "(STAGING) Pretend Pear X1"
 ```