docs: update version in the documentation

Author: fahchen

README.md

@@ -17,7 +17,7 @@ Add `:typed_structor` to the list of dependencies in `mix.exs`:
 ```elixir
 def deps do
   [
-    {:typed_structor, "~> 0.4"}
+    {:typed_structor, "~> 0.5"}
   ]
 end
 ```

guides/migrate_from_typed_struct.md

@@ -12,7 +12,7 @@ It is a drop-in replacement for `typed_struct`.
      [
        # ...deps
 -      {:typed_struct, "~> 0.3.0"},
-+      {:typed_structor, "~> 0.4"},
++      {:typed_structor, "~> 0.5"},
      ]
    end
 ```