Decrease heading level

README.md

@@ -25,13 +25,13 @@ These flags can be prefixed with either a single (`-`) or double (`--`) hyphen.
 
 Use the `--help` (`-h`) flag for more information.
 
-### 🐳 Docker
+## 🐳 Docker
 
 Use either with the [Dockerfile `HEALTHCHECK` instruction](https://docs.docker.com/engine/reference/builder/#healthcheck) or the [docker run `--health-*`](https://docs.docker.com/engine/reference/run/#healthcheck) flags.
 
 For example, `HEALTHCHECK... CMD healthcheck http://127.0.0.1`, or `docker run..... --health-cmd healthcheck http://127.0.0.1/ .....image:tag`.
 
-### 🖼️ Examples
+## 🖼️ Examples
 
 Checking if the `/metrics` endpoint at `localhost` on port `5000` will respond with a `200` status code when sending a `GET` request: