[llvm] [llvm][docs] Reorder sections in GitHub.rst (PR #134212)

[Andrzej Warzyński via llvm-commits]

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@@ -224,7 +128,6 @@ Approvals
 Before merging a PR you must have the required approvals. See
 :ref:`lgtm_how_a_patch_is_accepted` for more details.
 
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banach-space wrote:

Fixed, thanks!

https://github.com/llvm/llvm-project/pull/134212