[llvm] workflows/release-binaries: Always pull composite actions from main branch (PR #100805)

[Aiden Grossman via llvm-commits]

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@@ -148,6 +148,20 @@ jobs:
     if: github.repository == 'llvm/llvm-project'
     runs-on: ${{ inputs.runs-on }}
     steps:
+
+    - name: Checkout Actions
+      uses: actions/checkout at v4
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boomanaiden154 wrote:

Probably should be hash pinned to the same version as below.

https://github.com/llvm/llvm-project/pull/100805