Add title header to document

Author: mfisher87

modules/05-sharing-and-publishing/index.md

@@ -312,6 +312,8 @@ code block):
 ```{code} markdown
 :filename: index.md
 
+# My document title
+
 Hello, world!
 
 $$
@@ -540,6 +542,8 @@ export:
   - "pdf"
 ---
 
+# My document title
+
 Hello, world!
 ```