[clang-tools-extra] [clang-doc] Align indentation in templates (PR #171667)

[Erick Velez via cfe-commits]

evelez7 wrote:

### Merge activity

* **Dec 11, 4:48 PM UTC**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.com/github/pr/llvm/llvm-project/171667).


https://github.com/llvm/llvm-project/pull/171667