demo: make usernames consistently lowercase

exampleSite/content/home/about.md

@@ -8,5 +8,5 @@ title = "Biography"
 
 # Choose the user profile to display
 # This should be the username of a profile in your `content/author/` folder.
-author = "Admin"
+author = "admin"
 +++

exampleSite/content/post/getting-started/index.md

@@ -7,7 +7,7 @@ lastmod = 2018-01-13T00:00:00
 draft = false
 
 # Authors. Comma separated list, e.g. `["Bob Smith", "David Jones"]`.
-authors = ["Admin"]
+authors = ["admin"]
 
 tags = ["Academic"]
 summary = "Create a beautifully simple website or blog in under 10 minutes."

exampleSite/content/post/jupyter/index.md

@@ -6,7 +6,7 @@ date = 2019-02-05T00:00:00Z
 draft = false
 
 # Authors. Comma separated list, e.g. `["Bob Smith", "David Jones"]`.
-authors = ["Admin"]
+authors = ["admin"]
 
 # Tags and categories
 # For example, use `tags = []` for no tags, or the form `tags = ["A Tag", "Another Tag"]` for one or more tags.