[fix] missing indentation level in profile example (#4208)

Current example copy/paste as is causes the following exception :

```bash
12:32:47  Encountered an error:
argument of type 'NoneType' is not iterable
12:32:47  Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/dbt/main.py", line 136, in main
    results, succeeded = handle_and_check(args)
  File "/usr/local/lib/python3.10/site-packages/dbt/main.py", line 206, in handle_and_check
    task, res = run_from_args(parsed)
  File "/usr/local/lib/python3.10/site-packages/dbt/main.py", line 233, in run_from_args
    task = parsed.cls.from_args(args=parsed)
  File "/usr/local/lib/python3.10/site-packages/dbt/task/base.py", line 163, in from_args
    return super().from_args(args)
  File "/usr/local/lib/python3.10/site-packages/dbt/task/base.py", line 98, in from_args
    config = cls.ConfigType.from_args(args)
  File "/usr/local/lib/python3.10/site-packages/dbt/config/runtime.py", line 263, in from_args
    project, profile = cls.collect_parts(args)
  File "/usr/local/lib/python3.10/site-packages/dbt/config/runtime.py", line 207, in collect_parts
    profile = cls.collect_profile(args=args)
  File "/usr/local/lib/python3.10/site-packages/dbt/config/runtime.py", line 229, in collect_profile
    profile = cls._get_rendered_profile(args, profile_renderer, profile_name)
  File "/usr/local/lib/python3.10/site-packages/dbt/config/runtime.py", line 200, in _get_rendered_profile
    return Profile.render_from_args(args, profile_renderer, profile_name)
  File "/usr/local/lib/python3.10/site-packages/dbt/config/profile.py", line 428, in render_from_args
    return cls.from_raw_profiles(
  File "/usr/local/lib/python3.10/site-packages/dbt/config/profile.py", line 394, in from_raw_profiles
    return cls.from_raw_profile_info(
  File "/usr/local/lib/python3.10/site-packages/dbt/config/profile.py", line 338, in from_raw_profile_info
    target_name, profile_data = cls.render_profile(
  File "/usr/local/lib/python3.10/site-packages/dbt/config/profile.py", line 298, in render_profile
    raw_profile_data = cls._get_profile_data(raw_profile, profile_name, target_name)
  File "/usr/local/lib/python3.10/site-packages/dbt/config/profile.py", line 215, in _get_profile_data
    if target_name not in outputs:
TypeError: argument of type 'NoneType' is not iterable
```

## What are you changing in this pull request and why?
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see the [Content style
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## Checklist
<!--
Uncomment if you're publishing docs for a prerelease version of dbt
(delete if not applicable):
- [ ] Add versioning components, as described in [Versioning
Docs](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/single-sourcing-content.md#versioning-entire-pages)
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so my content adheres to these guidelines.
- [ ] Add a checklist item for anything that needs to happen before this
PR is merged, such as "needs technical review" or "change base branch."

Adding new pages (delete if not applicable):
- [ ] Add page to `website/sidebars.js`
- [ ] Provide a unique filename for the new page

Removing or renaming existing pages (delete if not applicable):
- [ ] Remove page from `website/sidebars.js`
- [ ] Add an entry `website/static/_redirects`
- [ ] [Ran link
testing](https://github.com/dbt-labs/docs.getdbt.com#running-the-cypress-tests-locally)
to update the links that point to the deleted page

Co-authored-by: Leona B. Campbell <[email protected]>

website/docs/quickstarts/manual-install-qs.md

@@ -103,16 +103,16 @@ When developing locally, dbt connects to your <Term id="data-warehouse" /> using
 jaffle_shop: # this needs to match the profile in your dbt_project.yml file
     target: dev
     outputs:
-    dev:
-        type: bigquery
-        method: service-account
-        keyfile: /Users/BBaggins/.dbt/dbt-tutorial-project-331118.json # replace this with the full path to your keyfile
-        project: grand-highway-265418 # Replace this with your project id
-        dataset: dbt_bbagins # Replace this with dbt_your_name, e.g. dbt_bilbo
-        threads: 1
-        timeout_seconds: 300
-        location: US
-        priority: interactive
+        dev:
+            type: bigquery
+            method: service-account
+            keyfile: /Users/BBaggins/.dbt/dbt-tutorial-project-331118.json # replace this with the full path to your keyfile
+            project: grand-highway-265418 # Replace this with your project id
+            dataset: dbt_bbagins # Replace this with dbt_your_name, e.g. dbt_bilbo
+            threads: 1
+            timeout_seconds: 300
+            location: US
+            priority: interactive
 ```
 
 </File>