[llvm] [CI] Make email check workflow fail when author's email is private in Github UI (PR #148694)

[Udit Kumar Agarwal via llvm-commits]

================
@@ -4,6 +4,7 @@ on:
   pull_request:
     types:
       - opened
+      - reopened
----------------
uditagarwal97 wrote:

Note for reviewers: I added this just to test this PR. Will remove it once everything else looks good.

https://github.com/llvm/llvm-project/pull/148694