fix indentation for elixir syntax highlighting

README.md

@@ -8,31 +8,31 @@ If [available in Hex](https://hex.pm/docs/publish), the package can be installed
 
   1. Add `amplitude` to your list of dependencies in `mix.exs`:
 
-    ```elixir
-    def deps do
-      [{:amplitude, "~> 0.1.0"}]
-    end
-    ```
+  ```elixir
+  def deps do
+    [{:amplitude, "~> 0.1.0"}]
+  end
+  ```
 
   2. Ensure `amplitude` is started before your application:
 
-    ```elixir
-    def application do
-      [applications: [:amplitude]]
-    end
-    ```
+  ```elixir
+  def application do
+    [applications: [:amplitude]]
+  end
+  ```
 
   3. Add an Amplitude API key to your application config file:
 
-    ```elixir
-    config :amplitude, api_key: "<your_api_key>"
-    ```
+  ```elixir
+  config :amplitude, api_key: "<your_api_key>"
+  ```
 
 ## Usage
 
   1. Track events with the `Amplitude.track/4` function:
 
-    ```elixir
-    iex> Amplitude.track("my_event", "jdoe_123", %{"ip" => "127.0.0.1"}, %{"cohort" => "Test A"})
-    {:ok, "success"}
-    ```
+  ```elixir
+  iex> Amplitude.track("my_event", "jdoe_123", %{"ip" => "127.0.0.1"}, %{"cohort" => "Test A"})
+  {:ok, "success"}
+  ```