add flag to correctly recognize the algorithm

see openssl/openssl#23089

Author: umbynos

.github/workflows/check-certificates.yml

@@ -62,7 +62,8 @@ jobs:
           (
             openssl ${{ matrix.certificate.type }} \
               -in "${{ env.CERTIFICATE_PATH }}" \
-              -noout -passin env:CERTIFICATE_PASSWORD
+              -noout -passin env:CERTIFICATE_PASSWORD \
+              -legacy
           ) || (
             echo "::error::Verification of ${{ matrix.certificate.identifier }} failed!!!"
             exit 1