Use sentence case for headings

Author: timriley

docsite/source/getting-started.html.md

@@ -4,7 +4,7 @@ layout: gem-single
 name: dry-types
 ---
 
-### Using `Dry::Types` in Your Application
+### Using dry-types in your application
 
 1. Make the base types available to your application by defining your own module built from `Dry.Types()`:
 
@@ -19,7 +19,7 @@ name: dry-types
     # => #<Dry::Types::Constructor type=#<Dry::Types::Definition primitive=String options={}>>
     ```
 
-### Creating Your First Type
+### Creating your first type
 
 1. Define a struct's types by passing the name & type to the `attribute` method:
 

docsite/source/optional-values.html.md

@@ -6,7 +6,7 @@ name: dry-types
 
 Types themselves have optional attributes you can apply to get further functionality.
 
-### Append `.optional` to a _Type_ to allow `nil` 
+### Append `.optional` to a type to allow `nil`
 
 By default, nil values raise an error:
 
@@ -32,6 +32,6 @@ optional_string[123]
 
 `Types::String.optional` is just syntactic sugar for `Types::Strict::Nil | Types::Strict::String`.
 
-### Handle optional values using Monads
+### Handle optional values using monads
 
 See [Maybe](docs::extensions/maybe) extension for another approach to handling optional values by returning a [_Monad_](/gems/dry-monads/) object.