remove doc build errors

Author: Mpdreamz

docs/source/markup/callout.md

@@ -13,6 +13,7 @@ project:
     content: CC-BY-4.0 <1>
   subject: MyST Markdown 
 ```
+1. The license
 
 
 ### C#

docs/source/markup/substitutions.md

@@ -18,9 +18,9 @@ Substitutions should work in code blocks too.
 ```{code} sh
 wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-{{version}}-linux-x86_64.tar.gz
 wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-{{version}}-linux-x86_64.tar.gz.sha512
-shasum -a 512 -c elasticsearch-{{version}}-linux-x86_64.tar.gz.sha512 <1>
+shasum -a 512 -c elasticsearch-{{version}}-linux-x86_64.tar.gz.sha512
 tar -xzf elasticsearch-{{version}}-linux-x86_64.tar.gz
-cd elasticsearch-{{version}}/ <2>
+cd elasticsearch-{{version}}/
 ```