[llvm] [workflow] Don't add a comment when the first run of the formatter passes (PR #86335)

[Tom Stellard via llvm-commits]

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@@ -34,7 +34,6 @@ jobs:
         uses: actions/checkout at v4
         with:
           reository: ${{ github.repository }}
-          ref: ${{ github.base_ref }}
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tstellar wrote:

Yeah, I'll drop that commit.

https://github.com/llvm/llvm-project/pull/86335