[llvm] Improve the pull-request subcription notification format by adding the description and files statistics (PR #65828)

[Mehdi Amini via llvm-commits]

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@@ -199,7 +246,6 @@ def extract_commit_hash(arg: str):
 
 
 class ReleaseWorkflow:
-
     CHERRY_PICK_FAILED_LABEL = "release:cherry-pick-failed"
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joker-eph wrote:

This is black formatting!

https://github.com/llvm/llvm-project/pull/65828