[llvm] [llvm][docs] Add Approvals section to GitHub guide (PR #113434)

[via llvm-commits]

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@@ -138,10 +138,16 @@ you won't encounter merge conflicts when landing the PR.
   collaborating with others on a single branch, be careful how and when you push
   changes. ``--force-with-lease`` may be useful in this situation.
 
+Approvals
+---------
+
+Before merging a PR you must have the required approvals. See
+:ref:`lgtm_how_a_patch_is_accepted` for more details.
+
 Landing your change
 -------------------
 
-When your PR has been accepted you can merge your changes.
+When your PR has been apporoved you can merge your changes.
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cor3ntin wrote:

typo!

https://github.com/llvm/llvm-project/pull/113434