docs automated-process: fix indentation for mkdocs

python-markdown has stricter syntax rules than Github's markdown parser does.
Four-space indentation is needed to make sure all the paragraphs are nested
under the <li>.

docs/automated-process.md

@@ -62,18 +62,22 @@ release process. The automated processes uses GitHub Actions to automate the
 
 5. You will need `antsibull` for this step. If you haven't installed it yet,
    you can do it like this:
-   ```
-   pip install antsibull[clipboard]
-   ```
-   Using `antsibull[clipboard]` makes sure you have really everything you need
-   for the announcements.
-
-   Then announce the release on the Forum, the mailing list and Matrix by
-   running the following command in the `${MAJOR_VERSION}` directory of the
-   `ansible-build-data` checkout:
+
+    ```
+    pip install antsibull[clipboard]
+    ```
+
+    Using `antsibull[clipboard]` makes sure you have really everything you need
+    for the announcements.
+
+    Then announce the release on the Forum, the mailing list and Matrix by
+    running the following command in the `${MAJOR_VERSION}` directory of the
+    `ansible-build-data` checkout:
+
     ```
     antsibull-build announcements --send --data-dir . ${VERSION}
     ```
+
     This will open your default browser and email client to do the announcement
     on the forum and the mailing list. It will also tell you where to announce
     this on Matrix, ask for the URL of the forum thread and create a suitable