Fix two typos (#39)

Author: lennartb-

_docs/fixture-customization.md

@@ -58,7 +58,7 @@ Composite customizations can also be implemented by inheriting from `CompositeCu
 ```csharp
 class DomainCustomization : CompositeCustomization
 {
-  public DoaminCustomization()
+  public DomainCustomization()
     : base(
         new CustomersCustomization(),
         new AddressCustomization())

readme.md

@@ -1,6 +1,6 @@
 # AutoFixture Documentation
 
-This is the official AutoFixture documentation repository. You can find the deployed versoin of the documentation at [AutoFixture.github.io](https://autofixture.github.io).
+This is the official AutoFixture documentation repository. You can find the deployed version of the documentation at [AutoFixture.github.io](https://autofixture.github.io).
 
 ## Contributing