Commit f442c00266 for openssl.org

commit f442c00266a6131a9d3e9c6e8b88d2809dffff4d
Author: Milan Broz <gmazyland@gmail.com>
Date:   Fri Jan 9 15:13:45 2026 +0100

    Add clang-21 to CI compilers

    Signed-off-by: Milan Broz <gmazyland@gmail.com>

    Reviewed-by: Neil Horman <nhorman@openssl.org>
    Reviewed-by: Nikola Pajkovsky <nikolap@openssl.org>
    (Merged from https://github.com/openssl/openssl/pull/29587)

diff --git a/.github/workflows/compiler-zoo.yml b/.github/workflows/compiler-zoo.yml
index 77f1496ac1..ad1279937c 100644
--- a/.github/workflows/compiler-zoo.yml
+++ b/.github/workflows/compiler-zoo.yml
@@ -49,7 +49,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        clang: [clang-11, clang-12, clang-13, clang-14, clang-15, clang-16, clang-17, clang-18, clang-19, clang-20]
+        clang: [clang-11, clang-12, clang-13, clang-14, clang-15, clang-16, clang-17, clang-18, clang-19, clang-20, clang-21]
     runs-on: ubuntu-22.04
     steps:
     - name: install packages